diff --git a/.dart_tool/package_config.json b/.dart_tool/package_config.json
index d0ee842..6cc4287 100644
--- a/.dart_tool/package_config.json
+++ b/.dart_tool/package_config.json
@@ -11,7 +11,7 @@
     "constraint, update this by running tools/generate_package_config.dart."
   ],
   "configVersion": 2,
-  "generated": "2021-05-03T18:00:16.673010",
+  "generated": "2021-05-05T10:52:59.908934",
   "generator": "tools/generate_package_config.dart",
   "packages": [
     {
@@ -253,18 +253,6 @@
       "languageVersion": "2.3"
     },
     {
-      "name": "devtools_server",
-      "rootUri": "../third_party/devtools/devtools_server",
-      "packageUri": "lib/",
-      "languageVersion": "2.6"
-    },
-    {
-      "name": "devtools_shared",
-      "rootUri": "../third_party/devtools/devtools_shared",
-      "packageUri": "lib/",
-      "languageVersion": "2.3"
-    },
-    {
       "name": "diagnostic",
       "rootUri": "../pkg/diagnostic",
       "packageUri": "lib/",
@@ -455,12 +443,6 @@
       "languageVersion": "2.2"
     },
     {
-      "name": "mustache",
-      "rootUri": "../third_party/pkg/mustache",
-      "packageUri": "lib/",
-      "languageVersion": "2.0"
-    },
-    {
       "name": "native_stack_traces",
       "rootUri": "../pkg/native_stack_traces",
       "packageUri": "lib/",
@@ -650,12 +632,6 @@
       "languageVersion": "2.12"
     },
     {
-      "name": "stagehand",
-      "rootUri": "../third_party/pkg/stagehand",
-      "packageUri": "lib/",
-      "languageVersion": "2.10"
-    },
-    {
       "name": "status_file",
       "rootUri": "../pkg/status_file",
       "packageUri": "lib/",
diff --git a/.packages b/.packages
index 1631e03..7cbfb89 100644
--- a/.packages
+++ b/.packages
@@ -21,7 +21,6 @@
 benchmark_harness:third_party/pkg/benchmark_harness/lib
 boolean_selector:third_party/pkg/boolean_selector/lib
 build_integration:pkg/build_integration/lib
-browser_launcher:third_party/pkg/browser_launcher/lib
 charcode:third_party/pkg/charcode/lib
 cli_util:third_party/pkg/cli_util/lib
 collection:third_party/pkg/collection/lib
@@ -38,7 +37,6 @@
 dartdoc:third_party/pkg/dartdoc/lib
 dds:pkg/dds/lib
 dev_compiler:pkg/dev_compiler/lib
-devtools_shared:third_party/devtools/devtools_shared/lib
 diagnostic:pkg/diagnostic/lib
 expect:pkg/expect/lib
 ffi:third_party/pkg/ffi/lib
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c0ae9b..cb0efef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,13 @@
     daylight saving changes that are not precisely one hour.
     (No change on the Web which uses the JavaScript `Date` object.)
 
+#### `dart:typed_data`
+
+*   **BREAKING CHANGE** (https://github.com/dart-lang/sdk/issues/45115)
+    Most types exposed by this library can no longer be extended, implemented
+    or mixed-in. The affected types are `ByteBuffer`, `TypedData` and *all*
+    its subclasses, `Int32x4`, `Float32x4`, `Float64x2` and `Endian.
+
 #### `dart:web_sql`
 
 *   `dart:web_sql` is marked deprecated and will be removed in an upcoming
@@ -24,7 +31,6 @@
     was abandoned more than 5 years ago and is not supported by most browsers.
     The `dart:web_sql` library has been documented as unsupported and deprecated
     for many years as well and but wasn't annotated properly until now.
-
 ### Dart VM
 
 *   **Breaking Change** [#45071][]: `Dart_NewWeakPersistentHandle`'s and
@@ -5741,4 +5747,4 @@
     compression.
 
 * `dart:isolate`: `Isolate.spawnUri` added the optional `packageRoot` argument,
-  which controls how it resolves `package:` URIs.
\ No newline at end of file
+  which controls how it resolves `package:` URIs.
diff --git a/DEPS b/DEPS
index 1124ea3..92a018b 100644
--- a/DEPS
+++ b/DEPS
@@ -80,10 +80,9 @@
   "boringssl_gen_rev": "7322fc15cc065d8d2957fccce6b62a509dc4d641",
   "boringssl_rev" : "1607f54fed72c6589d560254626909a64124f091",
   "browser-compat-data_tag": "v1.0.22",
-  "browser_launcher_rev": "12ab9f351a44ac803de9bc17bb2180bb312a9dd7",
   "charcode_rev": "bcd8a12c315b7a83390e4865ad847ecd9344cba2",
   "chrome_rev" : "19997",
-  "cli_util_rev" : "50cc840b146615899e97b892578848401b2028d5",
+  "cli_util_rev" : "8a73cd7eca373ff71d290ccf47d4829e5ca44209",
   "clock_rev" : "a494269254ba978e7ef8f192c5f7fec3fc05b9d3",
   "collection_rev": "9967dcd3d7645db6de48d5abfab3018bb0c84236",
   "convert_rev": "a60156c6efd653657c8926b5788219ed609917d7",
@@ -106,6 +105,7 @@
   "dart_style_rev": "f17c23e0eea9a870601c19d904e2a9c1a7c81470",
 
   "chromedriver_tag": "83.0.4103.39",
+  "browser_launcher_rev": "12ab9f351a44ac803de9bc17bb2180bb312a9dd7",
   "dartdoc_rev" : "505f163f7cb48e917503e4a23fbff1227e08b263",
   "devtools_rev" : "12ad5341ae0a275042c84a4e7be9a6c98db65612",
   "jsshell_tag": "version:88.0",
@@ -320,9 +320,6 @@
       Var('chromium_git') + '/external/github.com/mdn/browser-compat-data' +
       "@" + Var("browser-compat-data_tag"),
 
-  Var("dart_root") + "/third_party/pkg/browser_launcher":
-      Var("dart_git") + "browser_launcher.git" + "@" + Var("browser_launcher_rev"),
-
   Var("dart_root") + "/third_party/tcmalloc/gperftools":
       Var('chromium_git') + '/external/github.com/gperftools/gperftools.git' +
       "@" + Var("gperftools_revision"),
@@ -339,6 +336,9 @@
   Var("dart_root") + "/third_party/pkg/boolean_selector":
       Var("dart_git") + "boolean_selector.git" +
       "@" + Var("boolean_selector_rev"),
+  Var("dart_root") + "/third_party/pkg/browser_launcher":
+      Var("dart_git") + "browser_launcher.git" +
+      "@" + Var("browser_launcher_rev"),
   Var("dart_root") + "/third_party/pkg/charcode":
       Var("dart_git") + "charcode.git" + "@" + Var("charcode_rev"),
   Var("dart_root") + "/third_party/pkg/cli_util":
diff --git a/pkg/analyzer/lib/src/dart/element/type_provider.dart b/pkg/analyzer/lib/src/dart/element/type_provider.dart
index 2831cb48..dbc4a34 100644
--- a/pkg/analyzer/lib/src/dart/element/type_provider.dart
+++ b/pkg/analyzer/lib/src/dart/element/type_provider.dart
@@ -11,11 +11,13 @@
 const Map<String, Set<String>> _nonSubtypableClassMap = {
   'dart:async': _nonSubtypableDartAsyncClassNames,
   'dart:core': _nonSubtypableDartCoreClassNames,
+  'dart:typed_data': _nonSubtypableDartTypedDataClassNames,
 };
 
 const Set<String> _nonSubtypableClassNames = {
   ..._nonSubtypableDartCoreClassNames,
   ..._nonSubtypableDartAsyncClassNames,
+  ..._nonSubtypableDartTypedDataClassNames,
 };
 
 const Set<String> _nonSubtypableDartAsyncClassNames = {
@@ -31,6 +33,46 @@
   'String',
 };
 
+const Set<String> _nonSubtypableDartTypedDataClassNames = {
+  'ByteBuffer',
+  'ByteData',
+  'Endian',
+  'Float32List',
+  'Float32x4',
+  'Float32x4List',
+  'Float64List',
+  'Float64x2',
+  'Float64x2List',
+  'Int16List',
+  'Int32List',
+  'Int32x4',
+  'Int32x4List',
+  'Int64List',
+  'Int8List',
+  'TypedData',
+  'Uint16List',
+  'Uint32List',
+  'Uint64List',
+  'Uint8ClampedList',
+  'Uint8List',
+  'UnmodifiableByteBufferView',
+  'UnmodifiableByteDataView',
+  'UnmodifiableFloat32ListView',
+  'UnmodifiableFloat32x4ListView',
+  'UnmodifiableFloat64ListView',
+  'UnmodifiableFloat64x2ListView',
+  'UnmodifiableInt16ListView',
+  'UnmodifiableInt32ListView',
+  'UnmodifiableInt32x4ListView',
+  'UnmodifiableInt64ListView',
+  'UnmodifiableInt8ListView',
+  'UnmodifiableUint16ListView',
+  'UnmodifiableUint32ListView',
+  'UnmodifiableUint64ListView',
+  'UnmodifiableUint8ClampedListView',
+  'UnmodifiableUint8ListView',
+};
+
 /// Provide common functionality shared by the various TypeProvider
 /// implementations.
 abstract class TypeProviderBase implements TypeProvider {
diff --git a/pkg/analyzer/lib/src/dart/resolver/extension_member_resolver.dart b/pkg/analyzer/lib/src/dart/resolver/extension_member_resolver.dart
index e78d21f..ad735aa 100644
--- a/pkg/analyzer/lib/src/dart/resolver/extension_member_resolver.dart
+++ b/pkg/analyzer/lib/src/dart/resolver/extension_member_resolver.dart
@@ -79,9 +79,8 @@
           [
             name,
             noneMoreSpecific
-                .map((e) => "'${e.extension.name ?? '<unnamed>'}'")
-                .toList()
-                .commaSeparatedWithAnd,
+                .map((e) => e.extension.name ?? '<unnamed>')
+                .quotedAndCommaSeparatedWithAnd,
           ],
         );
         return ResolutionResult.ambiguous;
diff --git a/pkg/analyzer/lib/src/utilities/extensions/string.dart b/pkg/analyzer/lib/src/utilities/extensions/string.dart
index 6651cd7..a6ad2d8 100644
--- a/pkg/analyzer/lib/src/utilities/extensions/string.dart
+++ b/pkg/analyzer/lib/src/utilities/extensions/string.dart
@@ -2,59 +2,76 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-extension ListOfStringExtension on List<String> {
-  /// Produce a comma-separated representation of this list, with the last
+extension IterableOfStringExtension on Iterable<String> {
+  /// Produce a comma-separated representation of this iterable, with the last
   /// element preceded by 'and' when there are more than two elements in this
-  /// list.
+  /// iterable.
   String get commaSeparatedWithAnd => _commaSeparated('and');
 
-  /// Produce a comma-separated representation of this list, with the last
+  /// Produce a comma-separated representation of this iterable, with the last
   /// element preceded by 'or' when there are more than two elements in this
-  /// list.
+  /// iterable.
   String get commaSeparatedWithOr => _commaSeparated('or');
 
-  /// Produce a comma-separated representation of this list, with the last
+  /// Produce a comma-separated representation of this iterable, with the last
   /// element preceded by 'and' when there are more than two elements in this
-  /// list, and a pair of single quotes surrounding each element.
+  /// iterable, and a pair of single quotes surrounding each element.
   String get quotedAndCommaSeparatedWithAnd =>
       _commaSeparated('and', quoted: true);
 
-  /// Produce a comma-separated representation of this list, with the last
+  /// Produce a comma-separated representation of this iterable, with the last
   /// element preceded by the [conjunction] when there are more than two
-  /// elements in this list.
+  /// elements in this iterable.
   ///
   /// Each element is surrounded by a pair of single quotes if [quoted] is true.
   String _commaSeparated(String conjunction, {bool quoted = false}) {
-    if (length == 0) {
+    var iterator = this.iterator;
+
+    // If has zero elements.
+    if (!iterator.moveNext()) {
       return '';
-    } else if (length == 1) {
-      return quoted ? "'${this[0]}'" : this[0];
-    } else if (length == 2) {
+    }
+    var first = iterator.current;
+
+    // If has one element.
+    if (!iterator.moveNext()) {
+      return quoted ? "'$first'" : first;
+    }
+    var second = iterator.current;
+
+    // If has two elements.
+    if (!iterator.moveNext()) {
       return quoted
-          ? "'${this[0]}' $conjunction '${this[1]}'"
-          : '${this[0]} $conjunction ${this[1]}';
-    } else {
-      var buffer = StringBuffer();
-      for (int i = 0; i < length - 1; i++) {
-        if (quoted) {
-          buffer.write("'");
-        }
-        buffer.write(this[i]);
-        if (quoted) {
-          buffer.write("'");
-        }
-        buffer.write(', ');
-      }
-      buffer.write(conjunction);
-      buffer.write(' ');
-      if (quoted) {
-        buffer.write("'");
-      }
-      buffer.write(this[length - 1]);
-      if (quoted) {
-        buffer.write("'");
-      }
-      return buffer.toString();
+          ? "'$first' $conjunction '$second'"
+          : '$first $conjunction $second';
+    }
+    var third = iterator.current;
+
+    var buffer = StringBuffer();
+    _writeElement(buffer, first, quoted);
+    buffer.write(', ');
+    _writeElement(buffer, second, quoted);
+
+    var nextToWrite = third;
+    while (iterator.moveNext()) {
+      buffer.write(', ');
+      _writeElement(buffer, nextToWrite, quoted);
+      nextToWrite = iterator.current;
+    }
+    buffer.write(', ');
+    buffer.write(conjunction);
+    buffer.write(' ');
+    _writeElement(buffer, nextToWrite, quoted);
+    return buffer.toString();
+  }
+
+  void _writeElement(StringBuffer buffer, String element, bool quoted) {
+    if (quoted) {
+      buffer.write("'");
+    }
+    buffer.write(element);
+    if (quoted) {
+      buffer.write("'");
     }
   }
 }
diff --git a/pkg/analyzer/test/src/utilities/extensions/string_test.dart b/pkg/analyzer/test/src/utilities/extensions/string_test.dart
index ccf3226..c6c480b 100644
--- a/pkg/analyzer/test/src/utilities/extensions/string_test.dart
+++ b/pkg/analyzer/test/src/utilities/extensions/string_test.dart
@@ -8,12 +8,12 @@
 
 main() {
   defineReflectiveSuite(() {
-    defineReflectiveTests(ListOfStringExtensionTest);
+    defineReflectiveTests(IterableOfStringExtensionTest);
   });
 }
 
 @reflectiveTest
-class ListOfStringExtensionTest {
+class IterableOfStringExtensionTest {
   void test_commaSeparatedWithAnd_five() {
     expect(<String>['a', 'b', 'c', 'd', 'e'].commaSeparatedWithAnd,
         'a, b, c, d, and e');
@@ -27,6 +27,13 @@
     expect(<String>['a', 'b', 'c'].commaSeparatedWithAnd, 'a, b, and c');
   }
 
+  void test_commaSeparatedWithAnd_three_iterable() {
+    expect(
+      <String>['a', 'b', 'c'].reversed.commaSeparatedWithAnd,
+      'c, b, and a',
+    );
+  }
+
   void test_commaSeparatedWithAnd_two() {
     expect(<String>['a', 'b'].commaSeparatedWithAnd, 'a and b');
   }
diff --git a/pkg/compiler/lib/src/kernel/dart2js_target.dart b/pkg/compiler/lib/src/kernel/dart2js_target.dart
index c10c0e9..a048dea 100644
--- a/pkg/compiler/lib/src/kernel/dart2js_target.dart
+++ b/pkg/compiler/lib/src/kernel/dart2js_target.dart
@@ -115,8 +115,11 @@
 
   @override
   bool mayDefineRestrictedType(Uri uri) =>
-      uri.scheme == 'dart' &&
-      (uri.path == 'core' || uri.path == '_interceptors');
+      uri.isScheme('dart') &&
+      (uri.path == 'core' ||
+          uri.path == 'typed_data' ||
+          uri.path == '_interceptors' ||
+          uri.path == '_native_typed_data');
 
   @override
   bool allowPlatformPrivateLibraryAccess(Uri importer, Uri imported) =>
diff --git a/pkg/dartdev/lib/dartdev.dart b/pkg/dartdev/lib/dartdev.dart
index 5e581c5..b72fbba 100644
--- a/pkg/dartdev/lib/dartdev.dart
+++ b/pkg/dartdev/lib/dartdev.dart
@@ -40,8 +40,7 @@
     args = args
         .where(
           (element) => !(element.contains('--observe') ||
-              element.contains('--enable-vm-service') ||
-              element.contains('--devtools')),
+              element.contains('--enable-vm-service')),
         )
         .toList();
   }
diff --git a/pkg/dartdev/lib/src/commands/run.dart b/pkg/dartdev/lib/src/commands/run.dart
index d996c3c..db32bfe 100644
--- a/pkg/dartdev/lib/src/commands/run.dart
+++ b/pkg/dartdev/lib/src/commands/run.dart
@@ -158,10 +158,6 @@
         hide: !verbose,
         negatable: false,
         help: 'Enables tracing of library and script loading.',
-      )
-      ..addFlag(
-        'debug-dds',
-        hide: true,
       );
     addExperimentalFlags(argParser, verbose);
   }
@@ -183,18 +179,13 @@
     String launchDdsArg = argResults['launch-dds'];
     String ddsHost = '';
     String ddsPort = '';
-
-    // TODO(bkonyi): allow for users to choose not to launch DevTools
-    // See https://github.com/dart-lang/sdk/issues/45867.
-    const bool launchDevTools = true;
     bool launchDds = false;
     if (launchDdsArg != null) {
       launchDds = true;
-      final ddsUrl = launchDdsArg.split('\\:');
+      final ddsUrl = launchDdsArg.split(':');
       ddsHost = ddsUrl[0];
       ddsPort = ddsUrl[1];
     }
-    final bool debugDds = argResults['debug-dds'];
 
     bool disableServiceAuthCodes = argResults['disable-service-auth-codes'];
 
@@ -207,12 +198,7 @@
     if (launchDds) {
       debugSession = _DebuggingSession();
       if (!await debugSession.start(
-        ddsHost,
-        ddsPort,
-        disableServiceAuthCodes,
-        launchDevTools,
-        debugDds,
-      )) {
+          ddsHost, ddsPort, disableServiceAuthCodes)) {
         return errorExitCode;
       }
     }
@@ -256,19 +242,10 @@
 
 class _DebuggingSession {
   Future<bool> start(
-    String host,
-    String port,
-    bool disableServiceAuthCodes,
-    bool enableDevTools,
-    bool debugDds,
-  ) async {
-    final sdkDir = dirname(sdk.dart);
-    final fullSdk = sdkDir.endsWith('bin');
-    final ddsSnapshot = fullSdk
+      String host, String port, bool disableServiceAuthCodes) async {
+    final ddsSnapshot = (dirname(sdk.dart).endsWith('bin'))
         ? sdk.ddsSnapshot
-        : absolute(sdkDir, 'gen', 'dds.dart.snapshot');
-    final devToolsBinaries =
-        fullSdk ? sdk.devToolsBinaries : absolute(sdkDir, 'devtools');
+        : absolute(dirname(sdk.dart), 'gen', 'dds.dart.snapshot');
     if (!Sdk.checkArtifactExists(ddsSnapshot)) {
       return false;
     }
@@ -279,51 +256,30 @@
       serviceInfo = await Service.getInfo();
     }
     final process = await Process.start(
-      sdk.dart,
-      [
-        if (debugDds) '--enable-vm-service=0',
-        ddsSnapshot,
-        serviceInfo.serverUri.toString(),
-        host,
-        port,
-        disableServiceAuthCodes.toString(),
-        enableDevTools.toString(),
-        devToolsBinaries,
-        debugDds.toString(),
-      ],
-      mode: ProcessStartMode.detachedWithStdio,
-    );
+        sdk.dart,
+        [
+          if (dirname(sdk.dart).endsWith('bin'))
+            sdk.ddsSnapshot
+          else
+            absolute(dirname(sdk.dart), 'gen', 'dds.dart.snapshot'),
+          serviceInfo.serverUri.toString(),
+          host,
+          port,
+          disableServiceAuthCodes.toString(),
+        ],
+        mode: ProcessStartMode.detachedWithStdio);
     final completer = Completer<void>();
-    const devToolsMessagePrefix =
-        'The Dart DevTools debugger and profiler is available at:';
-    if (debugDds) {
-      StreamSubscription stdoutSub;
-      stdoutSub = process.stdout.transform(utf8.decoder).listen((event) {
-        if (event.startsWith(devToolsMessagePrefix)) {
-          final ddsDebuggingUri = event.split(' ').last;
-          print(
-            'A DevTools debugger for DDS is available at: $ddsDebuggingUri',
-          );
-          stdoutSub.cancel();
-        }
-      });
-    }
-    StreamSubscription stderrSub;
-    stderrSub = process.stderr.transform(utf8.decoder).listen((event) {
-      final result = json.decode(event) as Map<String, dynamic>;
-      final state = result['state'];
-      if (state == 'started') {
-        if (result.containsKey('devToolsUri')) {
-          final devToolsUri = result['devToolsUri'];
-          print('$devToolsMessagePrefix $devToolsUri');
-        }
-        stderrSub.cancel();
+    StreamSubscription sub;
+    sub = process.stderr.transform(utf8.decoder).listen((event) {
+      if (event == 'DDS started') {
+        sub.cancel();
         completer.complete();
-      } else {
-        stderrSub.cancel();
-        completer.completeError(
+      } else if (event.contains('Failed to start DDS')) {
+        sub.cancel();
+        completer.completeError(event.replaceAll(
+          'Failed to start DDS',
           'Could not start Observatory HTTP server',
-        );
+        ));
       }
     });
     try {
diff --git a/pkg/dartdev/lib/src/sdk.dart b/pkg/dartdev/lib/src/sdk.dart
index 426f810..3e8a12a 100644
--- a/pkg/dartdev/lib/src/sdk.dart
+++ b/pkg/dartdev/lib/src/sdk.dart
@@ -68,13 +68,6 @@
         'dds.dart.snapshot',
       );
 
-  String get devToolsBinaries => path.absolute(
-        sdkPath,
-        'bin',
-        'resources',
-        'devtools',
-      );
-
   String get pubSnapshot => path.absolute(
         sdkPath,
         'bin',
diff --git a/pkg/dartdev/test/commands/run_test.dart b/pkg/dartdev/test/commands/run_test.dart
index 58a4d56..b8cc5e8 100644
--- a/pkg/dartdev/test/commands/run_test.dart
+++ b/pkg/dartdev/test/commands/run_test.dart
@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'dart:async';
-import 'dart:convert';
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
@@ -302,61 +300,4 @@
     expect(result.stderr, isEmpty);
     expect(result.exitCode, 0);
   });
-
-  group('DevTools', () {
-    const devToolsMessagePrefix =
-        'The Dart DevTools debugger and profiler is available at: http://127.0.0.1:';
-
-    test('spawn simple', () async {
-      p = project(mainSrc: "void main() { print('Hello World'); }");
-      ProcessResult result = p.runSync([
-        'run',
-        '--enable-vm-service',
-        p.relativeFilePath,
-      ]);
-      expect(result.stdout, contains(devToolsMessagePrefix));
-    });
-
-    test('implicit spawn', () async {
-      p = project(mainSrc: "void main() { print('Hello World'); }");
-      ProcessResult result = p.runSync([
-        '--enable-vm-service',
-        p.relativeFilePath,
-      ]);
-      expect(result.stdout, contains(devToolsMessagePrefix));
-    });
-
-    test(
-      'spawn via SIGQUIT',
-      () async {
-        p = project(
-          mainSrc:
-              'void main() { print("ready"); int i = 0; while(true) { i++; } }',
-        );
-        Process process = await p.start([
-          p.relativeFilePath,
-        ]);
-
-        final readyCompleter = Completer<void>();
-        final completer = Completer<void>();
-
-        StreamSubscription sub;
-        sub = process.stdout.transform(utf8.decoder).listen((event) async {
-          if (event.contains('ready')) {
-            readyCompleter.complete();
-          } else if (event.contains(devToolsMessagePrefix)) {
-            await sub.cancel();
-            completer.complete();
-          }
-        });
-        // Wait for process to start.
-        await readyCompleter.future;
-        process.kill(ProcessSignal.sigquit);
-        await completer.future;
-        process.kill();
-      },
-      // No support for SIGQUIT on Windows.
-      skip: Platform.isWindows,
-    );
-  });
 }
diff --git a/pkg/dds/CHANGELOG.md b/pkg/dds/CHANGELOG.md
index b39156e..3db7549 100644
--- a/pkg/dds/CHANGELOG.md
+++ b/pkg/dds/CHANGELOG.md
@@ -1,5 +1,4 @@
-# 1.8.0-dev
-- Add support for launching DevTools from DDS.
+# 1.7.7-dev
 - Fixed issue where two clients subscribing to the same stream in close succession
   could result in DDS sending multiple `streamListen` requests to the VM service.
 
diff --git a/pkg/dds/bin/dds.dart b/pkg/dds/bin/dds.dart
index 45673f5..9937d26 100644
--- a/pkg/dds/bin/dds.dart
+++ b/pkg/dds/bin/dds.dart
@@ -4,7 +4,6 @@
 
 // @dart=2.10
 
-import 'dart:convert';
 import 'dart:io';
 
 import 'package:dds/dds.dart';
@@ -17,9 +16,6 @@
 ///   - DDS bind address
 ///   - DDS port
 ///   - Disable service authentication codes
-///   - Start DevTools
-///   - DevTools build directory
-///   - Enable logging
 Future<void> main(List<String> args) async {
   if (args.isEmpty) return;
 
@@ -41,37 +37,16 @@
     port: int.parse(args[2]),
   );
   final disableServiceAuthCodes = args[3] == 'true';
-
-  final startDevTools = args[4] == 'true';
-  Uri devToolsBuildDirectory;
-  if (args[5].isNotEmpty) {
-    devToolsBuildDirectory = Uri.file(args[5]);
-  }
-  final logRequests = args[6] == 'true';
   try {
     // TODO(bkonyi): add retry logic similar to that in vmservice_server.dart
     // See https://github.com/dart-lang/sdk/issues/43192.
-    final dds = await DartDevelopmentService.startDartDevelopmentService(
+    await DartDevelopmentService.startDartDevelopmentService(
       remoteVmServiceUri,
       serviceUri: serviceUri,
       enableAuthCodes: !disableServiceAuthCodes,
-      devToolsConfiguration: startDevTools
-          ? DevToolsConfiguration(
-              enable: startDevTools,
-              customBuildDirectoryPath: devToolsBuildDirectory,
-            )
-          : null,
-      logRequests: logRequests,
     );
-    stderr.write(json.encode({
-      'state': 'started',
-      if (dds.devToolsUri != null) 'devToolsUri': dds.devToolsUri.toString(),
-    }));
-  } catch (e, st) {
-    stderr.write(json.encode({
-      'state': 'error',
-      'error': '$e',
-      'stacktrace': '$st',
-    }));
+    stderr.write('DDS started');
+  } catch (e) {
+    stderr.writeln('Failed to start DDS:\n$e');
   }
 }
diff --git a/pkg/dds/lib/dds.dart b/pkg/dds/lib/dds.dart
index f0e913b..f7c7a05 100644
--- a/pkg/dds/lib/dds.dart
+++ b/pkg/dds/lib/dds.dart
@@ -44,8 +44,6 @@
     Uri serviceUri,
     bool enableAuthCodes = true,
     bool ipv6 = false,
-    DevToolsConfiguration devToolsConfiguration = const DevToolsConfiguration(),
-    bool logRequests = false,
   }) async {
     if (remoteVmServiceUri == null) {
       throw ArgumentError.notNull('remoteVmServiceUri');
@@ -82,8 +80,6 @@
       serviceUri,
       enableAuthCodes,
       ipv6,
-      devToolsConfiguration,
-      logRequests,
     );
     await service.startService();
     return service;
@@ -129,11 +125,6 @@
   /// Returns `null` if the service is not running.
   Uri get wsUri;
 
-  /// The HTTP [Uri] of the hosted DevTools instance.
-  ///
-  /// Returns `null` if DevTools is not running.
-  Uri get devToolsUri;
-
   /// Set to `true` if this instance of [DartDevelopmentService] is accepting
   /// requests.
   bool get isRunning;
@@ -177,13 +168,3 @@
   final int errorCode;
   final String message;
 }
-
-class DevToolsConfiguration {
-  const DevToolsConfiguration({
-    this.enable = false,
-    this.customBuildDirectoryPath,
-  });
-
-  final bool enable;
-  final Uri customBuildDirectoryPath;
-}
diff --git a/pkg/dds/lib/src/client.dart b/pkg/dds/lib/src/client.dart
index 9ceb162..f81bd25 100644
--- a/pkg/dds/lib/src/client.dart
+++ b/pkg/dds/lib/src/client.dart
@@ -21,25 +21,27 @@
 /// Representation of a single DDS client which manages the connection and
 /// DDS request intercepting / forwarding.
 class DartDevelopmentServiceClient {
-  DartDevelopmentServiceClient.fromWebSocket(
+  factory DartDevelopmentServiceClient.fromWebSocket(
     DartDevelopmentService dds,
     WebSocketChannel ws,
     json_rpc.Peer vmServicePeer,
-  ) : this._(
-          dds,
-          ws,
-          vmServicePeer,
-        );
+  ) =>
+      DartDevelopmentServiceClient._(
+        dds,
+        ws,
+        vmServicePeer,
+      );
 
-  DartDevelopmentServiceClient.fromSSEConnection(
+  factory DartDevelopmentServiceClient.fromSSEConnection(
     DartDevelopmentService dds,
     SseConnection sse,
     json_rpc.Peer vmServicePeer,
-  ) : this._(
-          dds,
-          sse,
-          vmServicePeer,
-        );
+  ) =>
+      DartDevelopmentServiceClient._(
+        dds,
+        sse,
+        vmServicePeer,
+      );
 
   DartDevelopmentServiceClient._(
     this.dds,
diff --git a/pkg/dds/lib/src/constants.dart b/pkg/dds/lib/src/constants.dart
index b69ae7c..2466390 100644
--- a/pkg/dds/lib/src/constants.dart
+++ b/pkg/dds/lib/src/constants.dart
@@ -16,10 +16,6 @@
   };
 }
 
-// Give connections time to reestablish before considering them closed.
-// Required to reestablish connections killed by UberProxy.
-const sseKeepAlive = Duration(seconds: 30);
-
 abstract class PauseTypeMasks {
   static const pauseOnStartMask = 1 << 0;
   static const pauseOnReloadMask = 1 << 1;
diff --git a/pkg/dds/lib/src/dds_impl.dart b/pkg/dds/lib/src/dds_impl.dart
index 85be647..db355fb 100644
--- a/pkg/dds/lib/src/dds_impl.dart
+++ b/pkg/dds/lib/src/dds_impl.dart
@@ -24,8 +24,6 @@
 import 'binary_compatible_peer.dart';
 import 'client.dart';
 import 'client_manager.dart';
-import 'constants.dart';
-import 'devtools/devtools_handler.dart';
 import 'expression_evaluator.dart';
 import 'isolate_manager.dart';
 import 'stream_manager.dart';
@@ -53,13 +51,7 @@
 
 class DartDevelopmentServiceImpl implements DartDevelopmentService {
   DartDevelopmentServiceImpl(
-    this._remoteVmServiceUri,
-    this._uri,
-    this._authCodesEnabled,
-    this._ipv6,
-    this._devToolsConfiguration,
-    this.shouldLogRequests,
-  ) {
+      this._remoteVmServiceUri, this._uri, this._authCodesEnabled, this._ipv6) {
     _clientManager = ClientManager(this);
     _expressionEvaluator = ExpressionEvaluator(this);
     _isolateManager = IsolateManager(this);
@@ -121,26 +113,20 @@
         (_ipv6 ? InternetAddress.loopbackIPv6 : InternetAddress.loopbackIPv4)
             .host;
     final port = uri?.port ?? 0;
-    final pipeline = const Pipeline();
-    if (shouldLogRequests) {
-      pipeline.addMiddleware(
-        logRequests(
-          logger: (String message, bool isError) {
-            print('Log: $message');
-          },
-        ),
-      );
-    }
-    pipeline.addMiddleware(_authCodeMiddleware);
-    final handler = pipeline.addHandler(_handlers().handler);
+
     // Start the DDS server.
-    _server = await io.serve(handler, host, port);
+    _server = await io.serve(
+        const Pipeline()
+            .addMiddleware(_authCodeMiddleware)
+            .addHandler(_handlers().handler),
+        host,
+        port);
 
     final tmpUri = Uri(
       scheme: 'http',
       host: host,
       port: _server.port,
-      path: '$authCode/',
+      path: '$_authCode/',
     );
 
     // Notify the VM service that this client is DDS and that it should close
@@ -171,7 +157,7 @@
       return;
     }
     _shuttingDown = true;
-    // Don't accept any more HTTP requests.
+    // Don't accept anymore HTTP requests.
     await _server?.close();
 
     // Close connections to clients.
@@ -211,7 +197,7 @@
             return forbidden;
           }
           final authToken = pathSegments[0];
-          if (authToken != authCode) {
+          if (authToken != _authCode) {
             return forbidden;
           }
           // Creates a new request with the authentication code stripped from
@@ -247,12 +233,18 @@
       });
 
   Handler _sseHandler() {
-    final handler = SseHandler(
-      authCodesEnabled
-          ? Uri.parse('/$authCode/$_kSseHandlerPath')
-          : Uri.parse('/$_kSseHandlerPath'),
-      keepAlive: sseKeepAlive,
-    );
+    // Give connections time to reestablish before considering them closed.
+    // Required to reestablish connections killed by UberProxy.
+    const keepAlive = Duration(seconds: 30);
+    final handler = authCodesEnabled
+        ? SseHandler(
+            Uri.parse('/$_authCode/$_kSseHandlerPath'),
+            keepAlive: keepAlive,
+          )
+        : SseHandler(
+            Uri.parse('/$_kSseHandlerPath'),
+            keepAlive: keepAlive,
+          );
 
     handler.connections.rest.listen((sseConnection) {
       final client = DartDevelopmentServiceClient.fromSSEConnection(
@@ -267,18 +259,10 @@
   }
 
   Handler _httpHandler() {
-    if (_devToolsConfiguration != null && _devToolsConfiguration.enable) {
-      // Install the DevTools handlers and forward any unhandled HTTP requests to
-      // the VM service.
-      final buildDir =
-          _devToolsConfiguration.customBuildDirectoryPath?.toFilePath();
-      return devtoolsHandler(
-        dds: this,
-        buildDir: buildDir,
-        notFoundHandler: proxyHandler(remoteVmServiceUri),
-      );
-    }
-    return proxyHandler(remoteVmServiceUri);
+    // DDS doesn't support any HTTP requests itself, so we just forward all of
+    // them to the VM service.
+    final cascade = Cascade().add(proxyHandler(remoteVmServiceUri));
+    return cascade.handler;
   }
 
   List<String> _cleanupPathSegments(Uri uri) {
@@ -312,43 +296,14 @@
     return uri.replace(scheme: 'sse', pathSegments: pathSegments);
   }
 
-  Uri _toDevTools(Uri uri) {
-    // The DevTools URI is a bit strange as the query parameters appear after
-    // the fragment. There's no nice way to encode the query parameters
-    // properly, so we create another Uri just to grab the formatted query.
-    // The result will need to have '/?' prepended when being used as the
-    // fragment to get the correct format.
-    final query = Uri(
-      queryParameters: {
-        'uri': wsUri.toString(),
-      },
-    ).query;
-    return Uri(
-      scheme: 'http',
-      host: uri.host,
-      port: uri.port,
-      pathSegments: [
-        ...uri.pathSegments.where(
-          (e) => e.isNotEmpty,
-        ),
-        'devtools',
-        '',
-      ],
-      fragment: '/?$query',
-    );
-  }
-
   String getNamespace(DartDevelopmentServiceClient client) =>
       clientManager.clients.keyOf(client);
 
   @override
   bool get authCodesEnabled => _authCodesEnabled;
   final bool _authCodesEnabled;
-  String get authCode => _authCode;
   String _authCode;
 
-  final bool shouldLogRequests;
-
   @override
   Uri get remoteVmServiceUri => _remoteVmServiceUri;
 
@@ -358,21 +313,17 @@
 
   @override
   Uri get uri => _uri;
-  Uri _uri;
 
   @override
   Uri get sseUri => _toSse(_uri);
 
   Uri get wsUri => _toWebSocket(_uri);
-
-  Uri get devToolsUri => _toDevTools(_uri);
+  Uri _uri;
 
   final bool _ipv6;
 
   bool get isRunning => _uri != null;
 
-  final DevToolsConfiguration _devToolsConfiguration;
-
   Future<void> get done => _done.future;
   Completer _done = Completer<void>();
   bool _shuttingDown = false;
diff --git a/pkg/dds/lib/src/devtools/devtools_client.dart b/pkg/dds/lib/src/devtools/devtools_client.dart
deleted file mode 100644
index 5f8670e..0000000
--- a/pkg/dds/lib/src/devtools/devtools_client.dart
+++ /dev/null
@@ -1,96 +0,0 @@
-// Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// @dart=2.9
-
-import 'dart:async';
-
-import 'package:json_rpc_2/src/server.dart' as json_rpc;
-import 'package:sse/src/server/sse_handler.dart';
-import 'package:stream_channel/stream_channel.dart';
-
-import 'server_api.dart';
-
-class LoggingMiddlewareSink<S> implements StreamSink<S> {
-  LoggingMiddlewareSink(this.sink);
-
-  @override
-  void add(S event) {
-    print('DevTools SSE response: $event');
-    sink.add(event);
-  }
-
-  @override
-  void addError(Object error, [StackTrace stackTrace]) {
-    print('DevTools SSE error response: $error');
-    sink.addError(error);
-  }
-
-  @override
-  Future addStream(Stream<S> stream) {
-    return sink.addStream(stream);
-  }
-
-  @override
-  Future close() => sink.close();
-
-  @override
-  Future get done => sink.done;
-
-  final StreamSink sink;
-}
-
-/// Represents a DevTools client connection to the DevTools server API.
-class DevToolsClient {
-  DevToolsClient.fromSSEConnection(
-    SseConnection sse,
-    bool loggingEnabled,
-  ) {
-    Stream<String> stream = sse.stream;
-    StreamSink sink = sse.sink;
-
-    if (loggingEnabled) {
-      stream = stream.map<String>((String e) {
-        print('DevTools SSE request: $e');
-        return e;
-      });
-      sink = LoggingMiddlewareSink(sink);
-    }
-
-    _server = json_rpc.Server(
-      StreamChannel(stream, sink),
-      strictProtocolChecks: false,
-    );
-    _registerJsonRpcMethods();
-    _server.listen();
-  }
-
-  void _registerJsonRpcMethods() {
-    _server.registerMethod('connected', (parameters) {
-      // Nothing to do here.
-    });
-
-    _server.registerMethod('currentPage', (parameters) {
-      // Nothing to do here.
-    });
-
-    _server.registerMethod('disconnected', (parameters) {
-      // Nothing to do here.
-    });
-
-    _server.registerMethod('getPreferenceValue', (parameters) {
-      final key = parameters['key'].asString;
-      final value = ServerApi.devToolsPreferences.properties[key];
-      return value;
-    });
-
-    _server.registerMethod('setPreferenceValue', (parameters) {
-      final key = parameters['key'].asString;
-      final value = parameters['value'].value;
-      ServerApi.devToolsPreferences.properties[key] = value;
-    });
-  }
-
-  json_rpc.Server _server;
-}
diff --git a/pkg/dds/lib/src/devtools/devtools_handler.dart b/pkg/dds/lib/src/devtools/devtools_handler.dart
deleted file mode 100644
index a0a4bf1..0000000
--- a/pkg/dds/lib/src/devtools/devtools_handler.dart
+++ /dev/null
@@ -1,87 +0,0 @@
-// Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// @dart=2.9
-
-import 'dart:async';
-
-import 'package:dds/src/constants.dart';
-import 'package:meta/meta.dart';
-import 'package:shelf/shelf.dart';
-import 'package:shelf_static/shelf_static.dart';
-import 'package:sse/server/sse_handler.dart';
-
-import '../dds_impl.dart';
-import 'devtools_client.dart';
-import 'server_api.dart';
-
-/// Returns a [Handler] which handles serving DevTools and the DevTools server
-/// API under $DDS_URI/devtools/.
-///
-/// [buildDir] is the path to the pre-compiled DevTools instance to be served.
-///
-/// [notFoundHandler] is a [Handler] to which requests that could not be handled
-/// by the DevTools handler are forwarded (e.g., a proxy to the VM service).
-FutureOr<Handler> devtoolsHandler({
-  @required DartDevelopmentServiceImpl dds,
-  @required String buildDir,
-  @required Handler notFoundHandler,
-}) {
-  // Serves the web assets for DevTools.
-  final devtoolsAssetHandler = createStaticHandler(
-    buildDir,
-    defaultDocument: 'index.html',
-  );
-
-  // Support DevTools client-server interface via SSE.
-  // Note: the handler path needs to match the full *original* path, not the
-  // current request URL (we remove '/devtools' in the initial router but we
-  // need to include it here).
-  const devToolsSseHandlerPath = '/devtools/api/sse';
-  final devToolsApiHandler = SseHandler(
-    dds.authCodesEnabled
-        ? Uri.parse('/${dds.authCode}$devToolsSseHandlerPath')
-        : Uri.parse(devToolsSseHandlerPath),
-    keepAlive: sseKeepAlive,
-  );
-
-  devToolsApiHandler.connections.rest.listen(
-    (sseConnection) => DevToolsClient.fromSSEConnection(
-      sseConnection,
-      dds.shouldLogRequests,
-    ),
-  );
-
-  final devtoolsHandler = (Request request) {
-    // If the request isn't of the form api/<method> assume it's a request for
-    // DevTools assets.
-    if (request.url.pathSegments.length < 2 ||
-        request.url.pathSegments.first != 'api') {
-      return devtoolsAssetHandler(request);
-    }
-    final method = request.url.pathSegments[1];
-    if (method == 'ping') {
-      // Note: we have an 'OK' body response, otherwise the response has an
-      // incorrect status code (204 instead of 200).
-      return Response.ok('OK');
-    }
-    if (method == 'sse') {
-      return devToolsApiHandler.handler(request);
-    }
-    if (!ServerApi.canHandle(request)) {
-      return Response.notFound('$method is not a valid API');
-    }
-    return ServerApi.handle(request);
-  };
-
-  return (request) {
-    final pathSegments = request.url.pathSegments;
-    if (pathSegments.isEmpty || pathSegments.first != 'devtools') {
-      return notFoundHandler(request);
-    }
-    // Forward all requests to /devtools/* to the DevTools handler.
-    request = request.change(path: 'devtools');
-    return devtoolsHandler(request);
-  };
-}
diff --git a/pkg/dds/lib/src/devtools/file_system.dart b/pkg/dds/lib/src/devtools/file_system.dart
deleted file mode 100644
index 9a05de7..0000000
--- a/pkg/dds/lib/src/devtools/file_system.dart
+++ /dev/null
@@ -1,84 +0,0 @@
-// Copyright 2021 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// @dart=2.9
-
-// TODO(bkonyi): remove once package:devtools_server_api is available
-// See https://github.com/flutter/devtools/issues/2958.
-
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:path/path.dart' as path;
-
-import 'usage.dart';
-
-class LocalFileSystem {
-  static String _userHomeDir() {
-    final String envKey =
-        Platform.operatingSystem == 'windows' ? 'APPDATA' : 'HOME';
-    final String value = Platform.environment[envKey];
-    return value == null ? '.' : value;
-  }
-
-  /// Returns the path to the DevTools storage directory.
-  static String devToolsDir() {
-    return path.join(_userHomeDir(), '.flutter-devtools');
-  }
-
-  /// Moves the .devtools file to ~/.flutter-devtools/.devtools if the .devtools file
-  /// exists in the user's home directory.
-  static void maybeMoveLegacyDevToolsStore() {
-    final file = File(path.join(_userHomeDir(), DevToolsUsage.storeName));
-    if (file.existsSync()) {
-      ensureDevToolsDirectory();
-      file.copySync(path.join(devToolsDir(), DevToolsUsage.storeName));
-      file.deleteSync();
-    }
-  }
-
-  /// Creates the ~/.flutter-devtools directory if it does not already exist.
-  static void ensureDevToolsDirectory() {
-    Directory('${LocalFileSystem.devToolsDir()}').createSync();
-  }
-
-  /// Returns a DevTools file from the given path.
-  ///
-  /// Only files within ~/.flutter-devtools/ can be accessed.
-  static File devToolsFileFromPath(String pathFromDevToolsDir) {
-    if (pathFromDevToolsDir.contains('..')) {
-      // The passed in path should not be able to walk up the directory tree
-      // outside of the ~/.flutter-devtools/ directory.
-      return null;
-    }
-    ensureDevToolsDirectory();
-    final file = File(path.join(devToolsDir(), pathFromDevToolsDir));
-    if (!file.existsSync()) {
-      return null;
-    }
-    return file;
-  }
-
-  /// Returns a DevTools file from the given path as encoded json.
-  ///
-  /// Only files within ~/.flutter-devtools/ can be accessed.
-  static String devToolsFileAsJson(String pathFromDevToolsDir) {
-    final file = devToolsFileFromPath(pathFromDevToolsDir);
-    if (file == null) return null;
-
-    final fileName = path.basename(file.path);
-    if (!fileName.endsWith('.json')) return null;
-
-    final content = file.readAsStringSync();
-    final json = jsonDecode(content);
-    json['lastModifiedTime'] = file.lastModifiedSync().toString();
-    return jsonEncode(json);
-  }
-
-  /// Whether the flutter store file exists.
-  static bool flutterStoreExists() {
-    final flutterStore = File('${_userHomeDir()}/.flutter');
-    return flutterStore.existsSync();
-  }
-}
diff --git a/pkg/dds/lib/src/devtools/server_api.dart b/pkg/dds/lib/src/devtools/server_api.dart
deleted file mode 100644
index b866f44..0000000
--- a/pkg/dds/lib/src/devtools/server_api.dart
+++ /dev/null
@@ -1,230 +0,0 @@
-// Copyright 2021 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// @dart=2.9
-
-// TODO(bkonyi): remove once package:devtools_server_api is available
-// See https://github.com/flutter/devtools/issues/2958.
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:devtools_shared/devtools_shared.dart';
-import 'package:shelf/shelf.dart' as shelf;
-
-import 'file_system.dart';
-import 'usage.dart';
-
-/// The DevTools server API.
-///
-/// This defines endpoints that serve all requests that come in over api/.
-class ServerApi {
-  static const errorNoActiveSurvey = 'ERROR: setActiveSurvey not called.';
-
-  /// Determines whether or not [request] is an API call.
-  static bool canHandle(shelf.Request request) {
-    return request.url.path.startsWith(apiPrefix);
-  }
-
-  /// Handles all requests.
-  ///
-  /// To override an API call, pass in a subclass of [ServerApi].
-  static FutureOr<shelf.Response> handle(
-    shelf.Request request, [
-    ServerApi api,
-  ]) {
-    api ??= ServerApi();
-    switch (request.url.path) {
-      // ----- Flutter Tool GA store. -----
-      case apiGetFlutterGAEnabled:
-        // Is Analytics collection enabled?
-        return api.getCompleted(
-          request,
-          json.encode(FlutterUsage.doesStoreExist ? _usage.enabled : null),
-        );
-      case apiGetFlutterGAClientId:
-        // Flutter Tool GA clientId - ONLY get Flutter's clientId if enabled is
-        // true.
-        return (FlutterUsage.doesStoreExist)
-            ? api.getCompleted(
-                request,
-                json.encode(_usage.enabled ? _usage.clientId : null),
-              )
-            : api.getCompleted(
-                request,
-                json.encode(null),
-              );
-
-      // ----- DevTools GA store. -----
-
-      case apiResetDevTools:
-        _devToolsUsage.reset();
-        return api.getCompleted(request, json.encode(true));
-      case apiGetDevToolsFirstRun:
-        // Has DevTools been run first time? To bring up welcome screen.
-        return api.getCompleted(
-          request,
-          json.encode(_devToolsUsage.isFirstRun),
-        );
-      case apiGetDevToolsEnabled:
-        // Is DevTools Analytics collection enabled?
-        return api.getCompleted(request, json.encode(_devToolsUsage.enabled));
-      case apiSetDevToolsEnabled:
-        // Enable or disable DevTools analytics collection.
-        final queryParams = request.requestedUri.queryParameters;
-        if (queryParams.containsKey(devToolsEnabledPropertyName)) {
-          _devToolsUsage.enabled =
-              json.decode(queryParams[devToolsEnabledPropertyName]);
-        }
-        return api.setCompleted(request, json.encode(_devToolsUsage.enabled));
-
-      // ----- DevTools survey store. -----
-
-      case apiSetActiveSurvey:
-        // Assume failure.
-        bool result = false;
-
-        // Set the active survey used to store subsequent apiGetSurveyActionTaken,
-        // apiSetSurveyActionTaken, apiGetSurveyShownCount, and
-        // apiIncrementSurveyShownCount calls.
-        final queryParams = request.requestedUri.queryParameters;
-        if (queryParams.keys.length == 1 &&
-            queryParams.containsKey(activeSurveyName)) {
-          final String theSurveyName = queryParams[activeSurveyName];
-
-          // Set the current activeSurvey.
-          _devToolsUsage.activeSurvey = theSurveyName;
-          result = true;
-        }
-
-        return api.getCompleted(request, json.encode(result));
-      case apiGetSurveyActionTaken:
-        // Request setActiveSurvey has not been requested.
-        if (_devToolsUsage.activeSurvey == null) {
-          return api.badRequest('$errorNoActiveSurvey '
-              '- $apiGetSurveyActionTaken');
-        }
-        // SurveyActionTaken has the survey been acted upon (taken or dismissed)
-        return api.getCompleted(
-          request,
-          json.encode(_devToolsUsage.surveyActionTaken),
-        );
-      // TODO(terry): remove the query param logic for this request.
-      // setSurveyActionTaken should only be called with the value of true, so
-      // we can remove the extra complexity.
-      case apiSetSurveyActionTaken:
-        // Request setActiveSurvey has not been requested.
-        if (_devToolsUsage.activeSurvey == null) {
-          return api.badRequest('$errorNoActiveSurvey '
-              '- $apiSetSurveyActionTaken');
-        }
-        // Set the SurveyActionTaken.
-        // Has the survey been taken or dismissed..
-        final queryParams = request.requestedUri.queryParameters;
-        if (queryParams.containsKey(surveyActionTakenPropertyName)) {
-          _devToolsUsage.surveyActionTaken =
-              json.decode(queryParams[surveyActionTakenPropertyName]);
-        }
-        return api.setCompleted(
-          request,
-          json.encode(_devToolsUsage.surveyActionTaken),
-        );
-      case apiGetSurveyShownCount:
-        // Request setActiveSurvey has not been requested.
-        if (_devToolsUsage.activeSurvey == null) {
-          return api.badRequest('$errorNoActiveSurvey '
-              '- $apiGetSurveyShownCount');
-        }
-        // SurveyShownCount how many times have we asked to take survey.
-        return api.getCompleted(
-          request,
-          json.encode(_devToolsUsage.surveyShownCount),
-        );
-      case apiIncrementSurveyShownCount:
-        // Request setActiveSurvey has not been requested.
-        if (_devToolsUsage.activeSurvey == null) {
-          return api.badRequest('$errorNoActiveSurvey '
-              '- $apiIncrementSurveyShownCount');
-        }
-        // Increment the SurveyShownCount, we've asked about the survey.
-        _devToolsUsage.incrementSurveyShownCount();
-        return api.getCompleted(
-          request,
-          json.encode(_devToolsUsage.surveyShownCount),
-        );
-      case apiGetBaseAppSizeFile:
-        final queryParams = request.requestedUri.queryParameters;
-        if (queryParams.containsKey(baseAppSizeFilePropertyName)) {
-          final filePath = queryParams[baseAppSizeFilePropertyName];
-          final fileJson = LocalFileSystem.devToolsFileAsJson(filePath);
-          if (fileJson == null) {
-            return api.badRequest('No JSON file available at $filePath.');
-          }
-          return api.getCompleted(request, fileJson);
-        }
-        return api.badRequest('Request for base app size file does not '
-            'contain a query parameter with the expected key: '
-            '$baseAppSizeFilePropertyName');
-      case apiGetTestAppSizeFile:
-        final queryParams = request.requestedUri.queryParameters;
-        if (queryParams.containsKey(testAppSizeFilePropertyName)) {
-          final filePath = queryParams[testAppSizeFilePropertyName];
-          final fileJson = LocalFileSystem.devToolsFileAsJson(filePath);
-          if (fileJson == null) {
-            return api.badRequest('No JSON file available at $filePath.');
-          }
-          return api.getCompleted(request, fileJson);
-        }
-        return api.badRequest('Request for test app size file does not '
-            'contain a query parameter with the expected key: '
-            '$testAppSizeFilePropertyName');
-      default:
-        return api.notImplemented(request);
-    }
-  }
-
-  // Accessing Flutter usage file e.g., ~/.flutter.
-  // NOTE: Only access the file if it exists otherwise Flutter Tool hasn't yet
-  //       been run.
-  static final FlutterUsage _usage =
-      FlutterUsage.doesStoreExist ? FlutterUsage() : null;
-
-  // Accessing DevTools usage file e.g., ~/.devtools
-  static final DevToolsUsage _devToolsUsage = DevToolsUsage();
-
-  static DevToolsUsage get devToolsPreferences => _devToolsUsage;
-
-  /// Logs a page view in the DevTools server.
-  ///
-  /// In the open-source version of DevTools, Google Analytics handles this
-  /// without any need to involve the server.
-  FutureOr<shelf.Response> logScreenView(shelf.Request request) =>
-      notImplemented(request);
-
-  /// Return the value of the property.
-  FutureOr<shelf.Response> getCompleted(shelf.Request request, String value) =>
-      shelf.Response.ok('$value');
-
-  /// Return the value of the property after the property value has been set.
-  FutureOr<shelf.Response> setCompleted(shelf.Request request, String value) =>
-      shelf.Response.ok('$value');
-
-  /// A [shelf.Response] for API calls that encountered a request problem e.g.,
-  /// setActiveSurvey not called.
-  ///
-  /// This is a 400 Bad Request response.
-  FutureOr<shelf.Response> badRequest([String logError]) {
-    if (logError != null) print(logError);
-    return shelf.Response(HttpStatus.badRequest);
-  }
-
-  /// A [shelf.Response] for API calls that have not been implemented in this
-  /// server.
-  ///
-  /// This is a no-op 204 No Content response because returning 404 Not Found
-  /// creates unnecessary noise in the console.
-  FutureOr<shelf.Response> notImplemented(shelf.Request request) =>
-      shelf.Response(HttpStatus.noContent);
-}
diff --git a/pkg/dds/lib/src/devtools/usage.dart b/pkg/dds/lib/src/devtools/usage.dart
deleted file mode 100644
index afa35d7..0000000
--- a/pkg/dds/lib/src/devtools/usage.dart
+++ /dev/null
@@ -1,236 +0,0 @@
-// Copyright 2021 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// @dart=2.9
-
-// TODO(bkonyi): remove once package:devtools_server_api is available
-// See https://github.com/flutter/devtools/issues/2958.
-
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:path/path.dart' as path;
-import 'package:usage/usage_io.dart';
-
-import 'file_system.dart';
-
-/// Access the file '~/.flutter'.
-class FlutterUsage {
-  /// Create a new Usage instance; [versionOverride] and [configDirOverride] are
-  /// used for testing.
-  FlutterUsage({
-    String settingsName = 'flutter',
-    String versionOverride,
-    String configDirOverride,
-  }) {
-    _analytics = AnalyticsIO('', settingsName, '');
-  }
-
-  Analytics _analytics;
-
-  /// Does the .flutter store exist?
-  static bool get doesStoreExist {
-    return LocalFileSystem.flutterStoreExists();
-  }
-
-  bool get isFirstRun => _analytics.firstRun;
-
-  bool get enabled => _analytics.enabled;
-
-  set enabled(bool value) => _analytics.enabled = value;
-
-  String get clientId => _analytics.clientId;
-}
-
-// Access the DevTools on disk store (~/.devtools/.devtools).
-class DevToolsUsage {
-  /// Create a new Usage instance; [versionOverride] and [configDirOverride] are
-  /// used for testing.
-  DevToolsUsage({
-    String versionOverride,
-    String configDirOverride,
-  }) {
-    LocalFileSystem.maybeMoveLegacyDevToolsStore();
-    properties = IOPersistentProperties(
-      storeName,
-      documentDirPath: LocalFileSystem.devToolsDir(),
-    );
-  }
-
-  static const storeName = '.devtools';
-
-  /// The activeSurvey is the property name of a top-level property
-  /// existing or created in the file ~/.devtools
-  /// If the property doesn't exist it is created with default survey values:
-  ///
-  ///   properties[activeSurvey]['surveyActionTaken'] = false;
-  ///   properties[activeSurvey]['surveyShownCount'] = 0;
-  ///
-  /// It is a requirement that the API apiSetActiveSurvey must be called before
-  /// calling any survey method on DevToolsUsage (addSurvey, rewriteActiveSurvey,
-  /// surveyShownCount, incrementSurveyShownCount, or surveyActionTaken).
-  String _activeSurvey;
-
-  IOPersistentProperties properties;
-
-  static const _surveyActionTaken = 'surveyActionTaken';
-  static const _surveyShownCount = 'surveyShownCount';
-
-  void reset() {
-    properties.remove('firstRun');
-    properties['enabled'] = false;
-  }
-
-  bool get isFirstRun {
-    properties['firstRun'] = properties['firstRun'] == null;
-    return properties['firstRun'];
-  }
-
-  bool get enabled {
-    if (properties['enabled'] == null) {
-      properties['enabled'] = false;
-    }
-
-    return properties['enabled'];
-  }
-
-  set enabled(bool value) {
-    properties['enabled'] = value;
-    return properties['enabled'];
-  }
-
-  bool surveyNameExists(String surveyName) => properties[surveyName] != null;
-
-  void _addSurvey(String surveyName) {
-    assert(activeSurvey != null);
-    assert(activeSurvey == surveyName);
-    rewriteActiveSurvey(false, 0);
-  }
-
-  String get activeSurvey => _activeSurvey;
-
-  set activeSurvey(String surveyName) {
-    assert(surveyName != null);
-    _activeSurvey = surveyName;
-
-    if (!surveyNameExists(activeSurvey)) {
-      // Create the survey if property is non-existent in ~/.devtools
-      _addSurvey(activeSurvey);
-    }
-  }
-
-  /// Need to rewrite the entire survey structure for property to be persisted.
-  void rewriteActiveSurvey(bool actionTaken, int shownCount) {
-    assert(activeSurvey != null);
-    properties[activeSurvey] = {
-      _surveyActionTaken: actionTaken,
-      _surveyShownCount: shownCount,
-    };
-  }
-
-  int get surveyShownCount {
-    assert(activeSurvey != null);
-    final prop = properties[activeSurvey];
-    if (prop[_surveyShownCount] == null) {
-      rewriteActiveSurvey(prop[_surveyActionTaken], 0);
-    }
-    return properties[activeSurvey][_surveyShownCount];
-  }
-
-  void incrementSurveyShownCount() {
-    assert(activeSurvey != null);
-    surveyShownCount; // Ensure surveyShownCount has been initialized.
-    final prop = properties[activeSurvey];
-    rewriteActiveSurvey(prop[_surveyActionTaken], prop[_surveyShownCount] + 1);
-  }
-
-  bool get surveyActionTaken {
-    assert(activeSurvey != null);
-    return properties[activeSurvey][_surveyActionTaken] == true;
-  }
-
-  set surveyActionTaken(bool value) {
-    assert(activeSurvey != null);
-    final prop = properties[activeSurvey];
-    rewriteActiveSurvey(value, prop[_surveyShownCount]);
-  }
-}
-
-abstract class PersistentProperties {
-  PersistentProperties(this.name);
-
-  final String name;
-
-  dynamic operator [](String key);
-
-  void operator []=(String key, dynamic value);
-
-  /// Re-read settings from the backing store.
-  ///
-  /// May be a no-op on some platforms.
-  void syncSettings();
-}
-
-const JsonEncoder _jsonEncoder = JsonEncoder.withIndent('  ');
-
-class IOPersistentProperties extends PersistentProperties {
-  IOPersistentProperties(
-    String name, {
-    String documentDirPath,
-  }) : super(name) {
-    final String fileName = name.replaceAll(' ', '_');
-    documentDirPath ??= LocalFileSystem.devToolsDir();
-    _file = File(path.join(documentDirPath, fileName));
-    if (!_file.existsSync()) {
-      _file.createSync(recursive: true);
-    }
-    syncSettings();
-  }
-
-  IOPersistentProperties.fromFile(File file) : super(path.basename(file.path)) {
-    _file = file;
-    if (!_file.existsSync()) {
-      _file.createSync(recursive: true);
-    }
-    syncSettings();
-  }
-
-  File _file;
-
-  Map _map;
-
-  @override
-  dynamic operator [](String key) => _map[key];
-
-  @override
-  void operator []=(String key, dynamic value) {
-    if (value == null && !_map.containsKey(key)) return;
-    if (_map[key] == value) return;
-
-    if (value == null) {
-      _map.remove(key);
-    } else {
-      _map[key] = value;
-    }
-
-    try {
-      _file.writeAsStringSync(_jsonEncoder.convert(_map) + '\n');
-    } catch (_) {}
-  }
-
-  @override
-  void syncSettings() {
-    try {
-      String contents = _file.readAsStringSync();
-      if (contents.isEmpty) contents = '{}';
-      _map = jsonDecode(contents);
-    } catch (_) {
-      _map = {};
-    }
-  }
-
-  void remove(String propertyName) {
-    _map.remove(propertyName);
-  }
-}
diff --git a/pkg/dds/pubspec.yaml b/pkg/dds/pubspec.yaml
index a69236c..221e3df 100644
--- a/pkg/dds/pubspec.yaml
+++ b/pkg/dds/pubspec.yaml
@@ -3,7 +3,7 @@
   A library used to spawn the Dart Developer Service, used to communicate with
   a Dart VM Service instance.
 
-version: 1.8.0-dev
+version: 1.7.6
 
 homepage: https://github.com/dart-lang/sdk/tree/master/pkg/dds
 
@@ -12,21 +12,18 @@
 
 dependencies:
   async: ^2.4.1
-  devtools_shared: ^2.0.0
   json_rpc_2: ^2.2.0
   meta: ^1.1.8
-  path: ^1.8.0
   pedantic: ^1.7.0
   shelf: ^1.0.0
   shelf_proxy: ^1.0.0
-  shelf_static: ^1.0.0-dev
   shelf_web_socket: ^1.0.0
   sse: ^3.7.0
   stream_channel: ^2.0.0
-  usage: ^4.0.0
   vm_service: ^6.0.1-nullsafety.0
   web_socket_channel: ^2.0.0
 
 dev_dependencies:
+  shelf_static: ^1.0.0
   test: ^1.0.0
   webdriver: ^3.0.0
diff --git a/pkg/dev_compiler/lib/src/kernel/target.dart b/pkg/dev_compiler/lib/src/kernel/target.dart
index 473b404..aab6be3 100644
--- a/pkg/dev_compiler/lib/src/kernel/target.dart
+++ b/pkg/dev_compiler/lib/src/kernel/target.dart
@@ -108,8 +108,11 @@
 
   @override
   bool mayDefineRestrictedType(Uri uri) =>
-      uri.scheme == 'dart' &&
-      (uri.path == 'core' || uri.path == '_interceptors');
+      uri.isScheme('dart') &&
+      (uri.path == 'core' ||
+          uri.path == 'typed_data' ||
+          uri.path == '_interceptors' ||
+          uri.path == '_native_typed_data');
 
   /// Returns [true] if [uri] represents a test script has been whitelisted to
   /// import private platform libraries.
diff --git a/pkg/front_end/lib/src/fasta/denylisted_classes.dart b/pkg/front_end/lib/src/fasta/denylisted_classes.dart
index c722cbe..345ec12 100644
--- a/pkg/front_end/lib/src/fasta/denylisted_classes.dart
+++ b/pkg/front_end/lib/src/fasta/denylisted_classes.dart
@@ -11,3 +11,44 @@
   "String",
   "Null"
 ];
+
+// List of special classes in dart:typed_data that can't be subclassed.
+const List<String> denylistedTypedDataClasses = [
+  "ByteBuffer",
+  "ByteData",
+  "Endian",
+  "Float32List",
+  "Float32x4",
+  "Float32x4List",
+  "Float64List",
+  "Float64x2",
+  "Float64x2List",
+  "Int16List",
+  "Int32List",
+  "Int32x4",
+  "Int32x4List",
+  "Int64List",
+  "Int8List",
+  "TypedData",
+  "Uint16List",
+  "Uint32List",
+  "Uint64List",
+  "Uint8ClampedList",
+  "Uint8List",
+  "UnmodifiableByteBufferView",
+  "UnmodifiableByteDataView",
+  "UnmodifiableFloat32ListView",
+  "UnmodifiableFloat32x4ListView",
+  "UnmodifiableFloat64ListView",
+  "UnmodifiableFloat64x2ListView",
+  "UnmodifiableInt16ListView",
+  "UnmodifiableInt32ListView",
+  "UnmodifiableInt32x4ListView",
+  "UnmodifiableInt64ListView",
+  "UnmodifiableInt8ListView",
+  "UnmodifiableUint16ListView",
+  "UnmodifiableUint32ListView",
+  "UnmodifiableUint64ListView",
+  "UnmodifiableUint8ClampedListView",
+  "UnmodifiableUint8ListView",
+];
diff --git a/pkg/front_end/lib/src/fasta/loader.dart b/pkg/front_end/lib/src/fasta/loader.dart
index c7d3cbe..98d86e8 100644
--- a/pkg/front_end/lib/src/fasta/loader.dart
+++ b/pkg/front_end/lib/src/fasta/loader.dart
@@ -85,6 +85,7 @@
   final Set<String> seenMessages = new Set<String>();
 
   LibraryBuilder coreLibrary;
+  LibraryBuilder typedDataLibrary;
 
   /// The first library that we've been asked to compile. When compiling a
   /// program (aka script), this is the library that should have a main method.
@@ -209,8 +210,12 @@
             packageLanguageVersionProblem, 0, noLength, library.fileUri);
       }
 
-      if (uri.scheme == "dart" && uri.path == "core") {
-        coreLibrary = library;
+      if (uri.scheme == "dart") {
+        if (uri.path == "core") {
+          coreLibrary = library;
+        } else if (uri.path == "typed_data") {
+          typedDataLibrary = library;
+        }
       }
       if (library.loader != this) {
         if (coreLibrary == library) {
@@ -231,8 +236,8 @@
       if (coreLibrary == library) {
         target.loadExtraRequiredLibraries(this);
       }
-      if (target.backendTarget
-          .mayDefineRestrictedType(origin?.importUri ?? uri)) {
+      Uri libraryUri = origin?.importUri ?? uri;
+      if (target.backendTarget.mayDefineRestrictedType(libraryUri)) {
         library.mayImplementRestrictedTypes = true;
       }
       if (uri.scheme == "dart") {
diff --git a/pkg/front_end/lib/src/fasta/source/source_loader.dart b/pkg/front_end/lib/src/fasta/source/source_loader.dart
index 675dee4..03c4d7d 100644
--- a/pkg/front_end/lib/src/fasta/source/source_loader.dart
+++ b/pkg/front_end/lib/src/fasta/source/source_loader.dart
@@ -67,7 +67,8 @@
 
 import '../../base/nnbd_mode.dart';
 
-import '../denylisted_classes.dart' show denylistedCoreClasses;
+import '../denylisted_classes.dart'
+    show denylistedCoreClasses, denylistedTypedDataClasses;
 
 import '../builder/builder.dart';
 import '../builder/class_builder.dart';
@@ -805,6 +806,14 @@
       denyListedClasses.add(coreLibrary
           .lookupLocalMember(denylistedCoreClasses[i], required: true));
     }
+    if (typedDataLibrary != null) {
+      for (int i = 0; i < denylistedTypedDataClasses.length; i++) {
+        // Allow the member to not exist. If it doesn't, nobody can extend it.
+        Builder member = typedDataLibrary
+            .lookupLocalMember(denylistedTypedDataClasses[i], required: false);
+        if (member != null) denyListedClasses.add(member);
+      }
+    }
 
     // Sort the classes topologically.
     Set<SourceClassBuilder> topologicallySortedClasses =
diff --git a/pkg/front_end/test/spell_checking_list_code.txt b/pkg/front_end/test/spell_checking_list_code.txt
index 42782a9..a1b8799 100644
--- a/pkg/front_end/test/spell_checking_list_code.txt
+++ b/pkg/front_end/test/spell_checking_list_code.txt
@@ -183,6 +183,7 @@
 claimed
 claims
 clamp
+clamped
 clarification
 clashes
 class's
@@ -446,7 +447,12 @@
 fishythefish
 fixnum
 fleshed
+float32
+float32x
+float32x4
 float64
+float64x
+float64x2
 floitsch
 flowed
 flushed
@@ -583,6 +589,12 @@
 inst
 instanceof
 instantiator
+int16
+int32
+int32x
+int32x4
+int64
+int8
 integrate
 intentionally
 interim
@@ -1270,6 +1282,7 @@
 uint
 uint16
 uint32
+uint64
 uint8
 umbrella
 un
@@ -1309,6 +1322,7 @@
 unlinked
 unlower
 unmark
+unmodifiable
 unneeded
 unordered
 unpaired
diff --git a/pkg/kernel/binary.md b/pkg/kernel/binary.md
index c891128..e501474 100644
--- a/pkg/kernel/binary.md
+++ b/pkg/kernel/binary.md
@@ -788,7 +788,6 @@
   Byte tag = 126;
   FileOffset fileOffset;
   Expression receiver;
-  DartType functionType;
 }
 
 type LocalFunctionInvocation extends Expression {
diff --git a/pkg/kernel/lib/target/targets.dart b/pkg/kernel/lib/target/targets.dart
index 6069ec8..c84fd53 100644
--- a/pkg/kernel/lib/target/targets.dart
+++ b/pkg/kernel/lib/target/targets.dart
@@ -273,10 +273,10 @@
   /// Whether a platform library may define a restricted type, such as `bool`,
   /// `int`, `double`, `num`, and `String`.
   ///
-  /// By default only `dart:core` may define restricted types, but some target
-  /// implementations override this.
+  /// By default only `dart:core` and `dart:typed_data` may define restricted
+  /// types, but some target implementations override this.
   bool mayDefineRestrictedType(Uri uri) =>
-      uri.scheme == 'dart' && uri.path == 'core';
+      uri.isScheme('dart') && (uri.path == 'core' || uri.path == 'typed_data');
 
   /// Whether a library is allowed to import a platform private library.
   ///
diff --git a/runtime/bin/main.cc b/runtime/bin/main.cc
index 95c7166..ee35109 100644
--- a/runtime/bin/main.cc
+++ b/runtime/bin/main.cc
@@ -553,12 +553,13 @@
     vm_service_server_port = 0;
   }
 
-  // We do not want to wait for DDS to advertise availability of VM service in
-  // the following scenarios:
-  // - The DartDev CLI is disabled (CLI isolate starts DDS) and VM service is
-  //   enabled.
-  // TODO(bkonyi): do we want to tie DevTools / DDS to the CLI in the long run?
-  bool wait_for_dds_to_advertise_service = !Options::disable_dart_dev();
+  // We do not want to wait for DDS to advertise availability of VM service in the
+  // following scenarios:
+  // - When the VM service is disabled (can be started at a later time via SIGQUIT).
+  // - The DartDev CLI is disabled (CLI isolate starts DDS) and VM service is enabled.
+  bool wait_for_dds_to_advertise_service =
+      !Options::disable_dart_dev() && Options::enable_vm_service();
+
   // Load embedder specific bits and return.
   if (!VmService::Setup(
           Options::disable_dart_dev() ? Options::vm_service_server_ip()
diff --git a/runtime/bin/main_options.cc b/runtime/bin/main_options.cc
index 77b794c..e60f6c8 100644
--- a/runtime/bin/main_options.cc
+++ b/runtime/bin/main_options.cc
@@ -583,7 +583,7 @@
         run_command = true;
       }
       if (!Options::disable_dart_dev() && enable_vm_service_ && run_command) {
-        const char* dds_format_str = "--launch-dds=%s\\:%d";
+        const char* dds_format_str = "--launch-dds=%s:%d";
         size_t size =
             snprintf(nullptr, 0, dds_format_str, vm_service_server_ip(),
                      vm_service_server_port());
@@ -603,7 +603,6 @@
       first_option = false;
     }
   }
-
   // Verify consistency of arguments.
 
   // snapshot_depfile is an alias for depfile. Passing them both is an error.
diff --git a/runtime/tests/vm/dart/transferable_throws_test.dart b/runtime/tests/vm/dart/transferable_throws_test.dart
index e649a86..67cba0a 100644
--- a/runtime/tests/vm/dart/transferable_throws_test.dart
+++ b/runtime/tests/vm/dart/transferable_throws_test.dart
@@ -95,10 +95,6 @@
   void operator []=(int index, T value) {}
 }
 
-class MyTypedData implements TypedData {
-  noSuchMethod(_) {}
-}
-
 main() async {
   await throwsIfMaterializeAfterSend();
   await throwsIfSendMoreThanOnce();
@@ -118,6 +114,4 @@
     Expect.throwsTypeError(
         () => TransferableTypedData.fromList(MyList<Uint8List>()));
   }
-  Expect.throwsArgumentError(
-      () => TransferableTypedData.fromList([MyTypedData()]));
 }
diff --git a/runtime/tests/vm/dart_2/transferable_throws_test.dart b/runtime/tests/vm/dart_2/transferable_throws_test.dart
index 7052072..95d1e09 100644
--- a/runtime/tests/vm/dart_2/transferable_throws_test.dart
+++ b/runtime/tests/vm/dart_2/transferable_throws_test.dart
@@ -95,10 +95,6 @@
   void operator []=(int index, T value) {}
 }
 
-class MyTypedData implements TypedData {
-  noSuchMethod(_) {}
-}
-
 main() async {
   await throwsIfMaterializeAfterSend();
   await throwsIfSendMoreThanOnce();
@@ -110,6 +106,4 @@
   Expect.throwsArgumentError(() => TransferableTypedData.fromList([null]));
   Expect.throwsArgumentError(
       () => TransferableTypedData.fromList(MyList<Uint8List>()));
-  Expect.throwsArgumentError(
-      () => TransferableTypedData.fromList([MyTypedData()]));
 }
diff --git a/runtime/vm/compiler/frontend/kernel_binary_flowgraph.cc b/runtime/vm/compiler/frontend/kernel_binary_flowgraph.cc
index 123a0a2..2ce3561 100644
--- a/runtime/vm/compiler/frontend/kernel_binary_flowgraph.cc
+++ b/runtime/vm/compiler/frontend/kernel_binary_flowgraph.cc
@@ -1131,8 +1131,20 @@
       return BuildVariableSet(payload, position);
     case kPropertyGet:
       return BuildPropertyGet(position);
+    case kInstanceGet:
+      return BuildInstanceGet(position);
+    case kDynamicGet:
+      return BuildDynamicGet(position);
+    case kInstanceTearOff:
+      return BuildInstanceTearOff(position);
+    case kFunctionTearOff:
+      return BuildFunctionTearOff(position);
     case kPropertySet:
       return BuildPropertySet(position);
+    case kInstanceSet:
+      return BuildInstanceSet(position);
+    case kDynamicSet:
+      return BuildDynamicSet(position);
     case kSuperPropertyGet:
       return BuildSuperPropertyGet(position);
     case kSuperPropertySet:
@@ -1142,7 +1154,17 @@
     case kStaticSet:
       return BuildStaticSet(position);
     case kMethodInvocation:
-      return BuildMethodInvocation(position);
+    case kInstanceInvocation:
+    case kDynamicInvocation:
+      return BuildMethodInvocation(position, tag);
+    case kLocalFunctionInvocation:
+      return BuildLocalFunctionInvocation(position);
+    case kFunctionInvocation:
+      return BuildFunctionInvocation(position);
+    case kEqualsCall:
+      return BuildEqualsCall(position);
+    case kEqualsNull:
+      return BuildEqualsNull(position);
     case kSuperMethodInvocation:
       return BuildSuperMethodInvocation(position);
     case kStaticInvocation:
@@ -1218,15 +1240,13 @@
     case kConstSetLiteral:
     case kConstMapLiteral:
     case kSymbolLiteral:
-      // Const invocations and const literals are removed by the
-      // constant evaluator.
     case kListConcatenation:
     case kSetConcatenation:
     case kMapConcatenation:
     case kInstanceCreation:
     case kFileUriExpression:
-      // Collection concatenation, instance creation operations and
-      // in-expression URI changes are internal to the front end and
+    case kStaticTearOff:
+      // These nodes are internal to the front end and
       // removed by the constant evaluator.
     default:
       ReportUnexpectedTag("expression", tag);
@@ -2155,6 +2175,7 @@
 
   return instructions;
 }
+
 Fragment StreamingFlowGraphBuilder::BuildPropertyGet(TokenPosition* p) {
   const intptr_t offset = ReaderOffset() - 1;     // Include the tag.
   const TokenPosition position = ReadPosition();  // read position.
@@ -2227,6 +2248,212 @@
   return instructions;
 }
 
+Fragment StreamingFlowGraphBuilder::BuildInstanceGet(TokenPosition* p) {
+  const intptr_t offset = ReaderOffset() - 1;     // Include the tag.
+  ReadByte();                                     // read kind.
+  const TokenPosition position = ReadPosition();  // read position.
+  if (p != nullptr) *p = position;
+
+  const DirectCallMetadata direct_call =
+      direct_call_metadata_helper_.GetDirectTargetForPropertyGet(offset);
+  const InferredTypeMetadata result_type =
+      inferred_type_metadata_helper_.GetInferredType(offset);
+
+  Fragment instructions = BuildExpression();  // read receiver.
+
+  LocalVariable* receiver = nullptr;
+  if (direct_call.check_receiver_for_null_) {
+    // Duplicate receiver for CheckNull before it is consumed by PushArgument.
+    receiver = MakeTemporary();
+    instructions += LoadLocal(receiver);
+  }
+
+  const String& getter_name = ReadNameAsGetterName();  // read name.
+  SkipDartType();                                      // read result_type.
+  const NameIndex itarget_name =
+      ReadInterfaceMemberNameReference();  // read interface_target_reference.
+  ASSERT(!H.IsRoot(itarget_name) && H.IsGetter(itarget_name));
+  const auto& interface_target = Function::ZoneHandle(
+      Z, H.LookupMethodByMember(itarget_name, H.DartGetterName(itarget_name)));
+  ASSERT(getter_name.ptr() == interface_target.name());
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += CheckNull(position, receiver, getter_name);
+  }
+
+  if (!direct_call.target_.IsNull()) {
+    ASSERT(CompilerState::Current().is_aot());
+    instructions +=
+        StaticCall(position, direct_call.target_, 1, Array::null_array(),
+                   ICData::kNoRebind, &result_type);
+  } else {
+    const intptr_t kTypeArgsLen = 0;
+    const intptr_t kNumArgsChecked = 1;
+    instructions +=
+        InstanceCall(position, getter_name, Token::kGET, kTypeArgsLen, 1,
+                     Array::null_array(), kNumArgsChecked, interface_target,
+                     Function::null_function(), &result_type);
+  }
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += DropTempsPreserveTop(1);  // Drop receiver, preserve result.
+  }
+
+  return instructions;
+}
+
+Fragment StreamingFlowGraphBuilder::BuildDynamicGet(TokenPosition* p) {
+  const intptr_t offset = ReaderOffset() - 1;     // Include the tag.
+  ReadByte();                                     // read kind.
+  const TokenPosition position = ReadPosition();  // read position.
+  if (p != nullptr) *p = position;
+
+  const DirectCallMetadata direct_call =
+      direct_call_metadata_helper_.GetDirectTargetForPropertyGet(offset);
+  const InferredTypeMetadata result_type =
+      inferred_type_metadata_helper_.GetInferredType(offset);
+
+  Fragment instructions = BuildExpression();  // read receiver.
+
+  LocalVariable* receiver = nullptr;
+  if (direct_call.check_receiver_for_null_) {
+    // Duplicate receiver for CheckNull before it is consumed by PushArgument.
+    receiver = MakeTemporary();
+    instructions += LoadLocal(receiver);
+  }
+
+  const String& getter_name = ReadNameAsGetterName();  // read name.
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += CheckNull(position, receiver, getter_name);
+  }
+
+  const auto& mangled_name = String::ZoneHandle(
+      Z, Function::CreateDynamicInvocationForwarderName(getter_name));
+  const Function* direct_call_target = &direct_call.target_;
+  if (!direct_call_target->IsNull()) {
+    direct_call_target = &Function::ZoneHandle(
+        direct_call.target_.GetDynamicInvocationForwarder(mangled_name));
+  }
+
+  if (!direct_call_target->IsNull()) {
+    ASSERT(CompilerState::Current().is_aot());
+    instructions +=
+        StaticCall(position, *direct_call_target, 1, Array::null_array(),
+                   ICData::kNoRebind, &result_type);
+  } else {
+    const intptr_t kTypeArgsLen = 0;
+    const intptr_t kNumArgsChecked = 1;
+    instructions += InstanceCall(position, mangled_name, Token::kGET,
+                                 kTypeArgsLen, 1, Array::null_array(),
+                                 kNumArgsChecked, Function::null_function(),
+                                 Function::null_function(), &result_type);
+  }
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += DropTempsPreserveTop(1);  // Drop receiver, preserve result.
+  }
+
+  return instructions;
+}
+
+Fragment StreamingFlowGraphBuilder::BuildInstanceTearOff(TokenPosition* p) {
+  const intptr_t offset = ReaderOffset() - 1;     // Include the tag.
+  ReadByte();                                     // read kind.
+  const TokenPosition position = ReadPosition();  // read position.
+  if (p != nullptr) *p = position;
+
+  const DirectCallMetadata direct_call =
+      direct_call_metadata_helper_.GetDirectTargetForPropertyGet(offset);
+  const InferredTypeMetadata result_type =
+      inferred_type_metadata_helper_.GetInferredType(offset);
+
+  Fragment instructions = BuildExpression();  // read receiver.
+
+  LocalVariable* receiver = nullptr;
+  if (direct_call.check_receiver_for_null_) {
+    // Duplicate receiver for CheckNull before it is consumed by PushArgument.
+    receiver = MakeTemporary();
+    instructions += LoadLocal(receiver);
+  }
+
+  const String& getter_name = ReadNameAsGetterName();  // read name.
+  SkipDartType();                                      // read result_type.
+  const NameIndex itarget_name =
+      ReadInterfaceMemberNameReference();  // read interface_target_reference.
+  ASSERT(!H.IsRoot(itarget_name) && H.IsMethod(itarget_name));
+  const auto& tearoff_interface_target = Function::ZoneHandle(
+      Z, H.LookupMethodByMember(itarget_name, H.DartMethodName(itarget_name)));
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += CheckNull(position, receiver, getter_name);
+  }
+
+  if (!direct_call.target_.IsNull()) {
+    ASSERT(CompilerState::Current().is_aot());
+    instructions +=
+        StaticCall(position, direct_call.target_, 1, Array::null_array(),
+                   ICData::kNoRebind, &result_type);
+  } else {
+    const intptr_t kTypeArgsLen = 0;
+    const intptr_t kNumArgsChecked = 1;
+    instructions += InstanceCall(position, getter_name, Token::kGET,
+                                 kTypeArgsLen, 1, Array::null_array(),
+                                 kNumArgsChecked, Function::null_function(),
+                                 tearoff_interface_target, &result_type);
+  }
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += DropTempsPreserveTop(1);  // Drop receiver, preserve result.
+  }
+
+  return instructions;
+}
+
+Fragment StreamingFlowGraphBuilder::BuildFunctionTearOff(TokenPosition* p) {
+  const intptr_t offset = ReaderOffset() - 1;     // Include the tag.
+  const TokenPosition position = ReadPosition();  // read position.
+  if (p != nullptr) *p = position;
+
+  const DirectCallMetadata direct_call =
+      direct_call_metadata_helper_.GetDirectTargetForPropertyGet(offset);
+  const InferredTypeMetadata result_type =
+      inferred_type_metadata_helper_.GetInferredType(offset);
+
+  Fragment instructions = BuildExpression();  // read receiver.
+
+  LocalVariable* receiver = nullptr;
+  if (direct_call.check_receiver_for_null_) {
+    // Duplicate receiver for CheckNull before it is consumed by PushArgument.
+    receiver = MakeTemporary();
+    instructions += LoadLocal(receiver);
+  }
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += CheckNull(position, receiver, Symbols::GetCall());
+  }
+
+  if (!direct_call.target_.IsNull()) {
+    ASSERT(CompilerState::Current().is_aot());
+    instructions +=
+        StaticCall(position, direct_call.target_, 1, Array::null_array(),
+                   ICData::kNoRebind, &result_type);
+  } else {
+    const intptr_t kTypeArgsLen = 0;
+    const intptr_t kNumArgsChecked = 1;
+    instructions += InstanceCall(position, Symbols::GetCall(), Token::kGET,
+                                 kTypeArgsLen, 1, Array::null_array(),
+                                 kNumArgsChecked, Function::null_function(),
+                                 Function::null_function(), &result_type);
+  }
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += DropTempsPreserveTop(1);  // Drop receiver, preserve result.
+  }
+
+  return instructions;
+}
+
 Fragment StreamingFlowGraphBuilder::BuildPropertySet(TokenPosition* p) {
   const intptr_t offset = ReaderOffset() - 1;  // Include the tag.
 
@@ -2322,6 +2549,171 @@
   return instructions;
 }
 
+Fragment StreamingFlowGraphBuilder::BuildInstanceSet(TokenPosition* p) {
+  const intptr_t offset = ReaderOffset() - 1;  // Include the tag.
+  ReadByte();                                  // read kind.
+
+  const DirectCallMetadata direct_call =
+      direct_call_metadata_helper_.GetDirectTargetForPropertySet(offset);
+  const CallSiteAttributesMetadata call_site_attributes =
+      call_site_attributes_metadata_helper_.GetCallSiteAttributes(offset);
+  const InferredTypeMetadata inferred_type =
+      inferred_type_metadata_helper_.GetInferredType(offset);
+
+  // True if callee can skip argument type checks.
+  bool is_unchecked_call = inferred_type.IsSkipCheck();
+  if (call_site_attributes.receiver_type != nullptr &&
+      call_site_attributes.receiver_type->HasTypeClass() &&
+      !Class::Handle(call_site_attributes.receiver_type->type_class())
+           .IsGeneric()) {
+    is_unchecked_call = true;
+  }
+
+  Fragment instructions(MakeTemp());
+  LocalVariable* variable = MakeTemporary();
+
+  const TokenPosition position = ReadPosition();  // read position.
+  if (p != nullptr) *p = position;
+
+  if (PeekTag() == kThisExpression) {
+    is_unchecked_call = true;
+  }
+  instructions += BuildExpression();  // read receiver.
+
+  LocalVariable* receiver = nullptr;
+  if (direct_call.check_receiver_for_null_) {
+    // Duplicate receiver for CheckNull before it is consumed by PushArgument.
+    receiver = MakeTemporary();
+    instructions += LoadLocal(receiver);
+  }
+
+  const String& setter_name = ReadNameAsSetterName();  // read name.
+
+  instructions += BuildExpression();  // read value.
+  instructions += StoreLocal(TokenPosition::kNoSource, variable);
+
+  const NameIndex itarget_name =
+      ReadInterfaceMemberNameReference();  // read interface_target_reference.
+  ASSERT(!H.IsRoot(itarget_name));
+  const auto& interface_target = Function::ZoneHandle(
+      Z, H.LookupMethodByMember(itarget_name, H.DartSetterName(itarget_name)));
+  ASSERT(setter_name.ptr() == interface_target.name());
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += CheckNull(position, receiver, setter_name);
+  }
+
+  if (!direct_call.target_.IsNull()) {
+    ASSERT(CompilerState::Current().is_aot());
+    instructions +=
+        StaticCall(position, direct_call.target_, 2, Array::null_array(),
+                   ICData::kNoRebind, /*result_type=*/nullptr,
+                   /*type_args_count=*/0,
+                   /*use_unchecked_entry=*/is_unchecked_call);
+  } else {
+    const intptr_t kTypeArgsLen = 0;
+    const intptr_t kNumArgsChecked = 1;
+
+    instructions += InstanceCall(
+        position, setter_name, Token::kSET, kTypeArgsLen, 2,
+        Array::null_array(), kNumArgsChecked, interface_target,
+        Function::null_function(),
+        /*result_type=*/nullptr,
+        /*use_unchecked_entry=*/is_unchecked_call, &call_site_attributes);
+  }
+
+  instructions += Drop();  // Drop result of the setter invocation.
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += Drop();  // Drop receiver.
+  }
+
+  return instructions;
+}
+
+Fragment StreamingFlowGraphBuilder::BuildDynamicSet(TokenPosition* p) {
+  const intptr_t offset = ReaderOffset() - 1;  // Include the tag.
+  ReadByte();                                  // read kind.
+
+  const DirectCallMetadata direct_call =
+      direct_call_metadata_helper_.GetDirectTargetForPropertySet(offset);
+  const CallSiteAttributesMetadata call_site_attributes =
+      call_site_attributes_metadata_helper_.GetCallSiteAttributes(offset);
+  const InferredTypeMetadata inferred_type =
+      inferred_type_metadata_helper_.GetInferredType(offset);
+
+  // True if callee can skip argument type checks.
+  bool is_unchecked_call = inferred_type.IsSkipCheck();
+  if (call_site_attributes.receiver_type != nullptr &&
+      call_site_attributes.receiver_type->HasTypeClass() &&
+      !Class::Handle(call_site_attributes.receiver_type->type_class())
+           .IsGeneric()) {
+    is_unchecked_call = true;
+  }
+
+  Fragment instructions(MakeTemp());
+  LocalVariable* variable = MakeTemporary();
+
+  const TokenPosition position = ReadPosition();  // read position.
+  if (p != nullptr) *p = position;
+
+  if (PeekTag() == kThisExpression) {
+    is_unchecked_call = true;
+  }
+  instructions += BuildExpression();  // read receiver.
+
+  LocalVariable* receiver = nullptr;
+  if (direct_call.check_receiver_for_null_) {
+    // Duplicate receiver for CheckNull before it is consumed by PushArgument.
+    receiver = MakeTemporary();
+    instructions += LoadLocal(receiver);
+  }
+
+  const String& setter_name = ReadNameAsSetterName();  // read name.
+
+  instructions += BuildExpression();  // read value.
+  instructions += StoreLocal(TokenPosition::kNoSource, variable);
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += CheckNull(position, receiver, setter_name);
+  }
+
+  const Function* direct_call_target = &direct_call.target_;
+  const auto& mangled_name = String::ZoneHandle(
+      Z, Function::CreateDynamicInvocationForwarderName(setter_name));
+  if (!direct_call_target->IsNull()) {
+    direct_call_target = &Function::ZoneHandle(
+        direct_call.target_.GetDynamicInvocationForwarder(mangled_name));
+  }
+
+  if (!direct_call_target->IsNull()) {
+    ASSERT(CompilerState::Current().is_aot());
+    instructions +=
+        StaticCall(position, *direct_call_target, 2, Array::null_array(),
+                   ICData::kNoRebind, /*result_type=*/nullptr,
+                   /*type_args_count=*/0,
+                   /*use_unchecked_entry=*/is_unchecked_call);
+  } else {
+    const intptr_t kTypeArgsLen = 0;
+    const intptr_t kNumArgsChecked = 1;
+
+    instructions += InstanceCall(
+        position, mangled_name, Token::kSET, kTypeArgsLen, 2,
+        Array::null_array(), kNumArgsChecked, Function::null_function(),
+        Function::null_function(),
+        /*result_type=*/nullptr,
+        /*use_unchecked_entry=*/is_unchecked_call, &call_site_attributes);
+  }
+
+  instructions += Drop();  // Drop result of the setter invocation.
+
+  if (direct_call.check_receiver_for_null_) {
+    instructions += Drop();  // Drop receiver.
+  }
+
+  return instructions;
+}
+
 static Function& GetNoSuchMethodOrDie(Thread* thread,
                                       Zone* zone,
                                       const Class& klass) {
@@ -2641,10 +3033,20 @@
   }
 }
 
-Fragment StreamingFlowGraphBuilder::BuildMethodInvocation(TokenPosition* p) {
+Fragment StreamingFlowGraphBuilder::BuildMethodInvocation(TokenPosition* p,
+                                                          Tag tag) {
+  ASSERT((tag == kMethodInvocation) || (tag == kInstanceInvocation) ||
+         (tag == kDynamicInvocation));
   const intptr_t offset = ReaderOffset() - 1;  // Include the tag.
 
-  const uint8_t flags = ReadFlags();  // read flags.
+  if ((tag == kInstanceInvocation) || (tag == kDynamicInvocation)) {
+    ReadByte();  // read kind.
+  }
+
+  // read flags.
+  const uint8_t flags =
+      ((tag == kMethodInvocation) || (tag == kInstanceInvocation)) ? ReadFlags()
+                                                                   : 0;
   const bool is_invariant = (flags & kMethodInvocationFlagInvariant) != 0;
 
   const TokenPosition position = ReadPosition();  // read position.
@@ -2759,9 +3161,15 @@
     checked_argument_count = argument_count;
   }
 
+  if (tag == kInstanceInvocation) {
+    SkipDartType();  // read function_type.
+  }
+
   const Function* interface_target = &Function::null_function();
   const NameIndex itarget_name =
-      ReadInterfaceMemberNameReference();  // read interface_target_reference.
+      ((tag == kMethodInvocation) || (tag == kInstanceInvocation))
+          ? ReadInterfaceMemberNameReference()
+          : NameIndex();  // read interface_target_reference.
   // TODO(dartbug.com/34497): Once front-end desugars calls via
   // fields/getters, filtering of field and getter interface targets here
   // can be turned into assertions.
@@ -2846,6 +3254,191 @@
   return instructions;
 }
 
+Fragment StreamingFlowGraphBuilder::BuildLocalFunctionInvocation(
+    TokenPosition* p) {
+  const TokenPosition position = ReadPosition();
+  if (p != nullptr) *p = position;
+  // read variable kernel position.
+  const intptr_t variable_kernel_position = ReadUInt();
+  ReadUInt();  // read relative variable index.
+
+  LocalVariable* variable = LookupVariable(variable_kernel_position);
+  ASSERT(!variable->is_late());
+
+  Fragment instructions;
+
+  // Type arguments.
+  intptr_t type_args_len = 0;
+  {
+    AlternativeReadingScope alt(&reader_);
+    ReadUInt();                               // read argument count.
+    intptr_t list_length = ReadListLength();  // read types list length.
+    if (list_length > 0) {
+      const TypeArguments& type_arguments =
+          T.BuildTypeArguments(list_length);  // read types.
+      instructions += TranslateInstantiatedTypeArguments(type_arguments);
+    }
+    type_args_len = list_length;
+  }
+
+  // Receiver (closure).
+  instructions += LoadLocal(variable);
+
+  intptr_t argument_count;
+  intptr_t positional_argument_count;
+  Array& argument_names = Array::ZoneHandle(Z);
+  instructions +=
+      BuildArguments(&argument_names, &argument_count,
+                     &positional_argument_count);  // read arguments.
+  ++argument_count;                                // include receiver
+
+  SkipDartType();  // read function_type.
+
+  // Lookup the function in the closure.
+  instructions += LoadLocal(variable);
+  instructions += LoadNativeField(Slot::Closure_function());
+  if (parsed_function()->function().is_debuggable()) {
+    ASSERT(!parsed_function()->function().is_native());
+    instructions += DebugStepCheck(position);
+  }
+  instructions +=
+      B->ClosureCall(position, type_args_len, argument_count, argument_names,
+                     /*use_unchecked_entry=*/true);
+  return instructions;
+}
+
+Fragment StreamingFlowGraphBuilder::BuildFunctionInvocation(TokenPosition* p) {
+  const intptr_t offset = ReaderOffset() - 1;  // Include the tag.
+  const FunctionAccessKind function_access_kind =
+      static_cast<FunctionAccessKind>(ReadByte());  // read kind.
+  const TokenPosition position = ReadPosition();    // read position.
+  if (p != nullptr) *p = position;
+
+  const InferredTypeMetadata result_type =
+      inferred_type_metadata_helper_.GetInferredType(offset);
+  const CallSiteAttributesMetadata call_site_attributes =
+      call_site_attributes_metadata_helper_.GetCallSiteAttributes(offset);
+
+  const bool is_unchecked_closure_call =
+      (function_access_kind == FunctionAccessKind::kFunctionType);
+  Fragment instructions;
+
+  instructions += BuildExpression();  // read receiver.
+  LocalVariable* receiver_temp = MakeTemporary();
+
+  // Type arguments.
+  intptr_t type_args_len = 0;
+  {
+    AlternativeReadingScope alt(&reader_);
+    ReadUInt();                               // read argument count.
+    intptr_t list_length = ReadListLength();  // read types list length.
+    if (list_length > 0) {
+      const TypeArguments& type_arguments =
+          T.BuildTypeArguments(list_length);  // read types.
+      instructions += TranslateInstantiatedTypeArguments(type_arguments);
+    }
+    type_args_len = list_length;
+  }
+
+  // Receiver (closure).
+  instructions += LoadLocal(receiver_temp);
+
+  intptr_t argument_count;
+  intptr_t positional_argument_count;
+  Array& argument_names = Array::ZoneHandle(Z);
+  instructions +=
+      BuildArguments(&argument_names, &argument_count,
+                     &positional_argument_count);  // read arguments.
+  ++argument_count;                                // include receiver
+
+  SkipDartType();  // read function_type.
+
+  if (is_unchecked_closure_call) {
+    instructions += CheckNull(position, receiver_temp, Symbols::Call(),
+                              /*clear_temp=*/false);
+    // Lookup the function in the closure.
+    instructions += LoadLocal(receiver_temp);
+    instructions += LoadNativeField(Slot::Closure_function());
+    if (parsed_function()->function().is_debuggable()) {
+      ASSERT(!parsed_function()->function().is_native());
+      instructions += DebugStepCheck(position);
+    }
+    instructions +=
+        B->ClosureCall(position, type_args_len, argument_count, argument_names,
+                       /*use_unchecked_entry=*/true);
+  } else {
+    instructions += InstanceCall(
+        position, Symbols::DynamicCall(), Token::kILLEGAL, type_args_len,
+        argument_count, argument_names, 1, Function::null_function(),
+        Function::null_function(), &result_type,
+        /*use_unchecked_entry=*/false, &call_site_attributes,
+        result_type.ReceiverNotInt());
+  }
+  instructions += DropTempsPreserveTop(1);
+  return instructions;
+}
+
+Fragment StreamingFlowGraphBuilder::BuildEqualsCall(TokenPosition* p) {
+  const intptr_t offset = ReaderOffset() - 1;     // Include the tag.
+  const TokenPosition position = ReadPosition();  // read position.
+  if (p != nullptr) *p = position;
+
+  const DirectCallMetadata direct_call =
+      direct_call_metadata_helper_.GetDirectTargetForMethodInvocation(offset);
+  ASSERT(!direct_call.check_receiver_for_null_);
+  const InferredTypeMetadata result_type =
+      inferred_type_metadata_helper_.GetInferredType(offset);
+  const CallSiteAttributesMetadata call_site_attributes =
+      call_site_attributes_metadata_helper_.GetCallSiteAttributes(offset);
+
+  Fragment instructions;
+  instructions += BuildExpression();  // read left.
+  instructions += BuildExpression();  // read right.
+  SkipDartType();                     // read function_type.
+
+  const NameIndex itarget_name =
+      ReadInterfaceMemberNameReference();  // read interface_target_reference.
+  const auto& interface_target = Function::ZoneHandle(
+      Z,
+      H.LookupMethodByMember(itarget_name, H.DartProcedureName(itarget_name)));
+  ASSERT(interface_target.name() == Symbols::EqualOperator().ptr());
+
+  const intptr_t kTypeArgsLen = 0;
+  const intptr_t kNumArgs = 2;
+  const intptr_t kNumCheckedArgs = 2;
+
+  if (!direct_call.target_.IsNull()) {
+    ASSERT(CompilerState::Current().is_aot());
+    instructions +=
+        StaticCall(position, direct_call.target_, kNumArgs, Array::null_array(),
+                   ICData::kNoRebind, &result_type, kTypeArgsLen,
+                   /*use_unchecked_entry=*/true);
+  } else {
+    instructions += InstanceCall(
+        position, Symbols::EqualOperator(), Token::kEQ, kTypeArgsLen, kNumArgs,
+        Array::null_array(), kNumCheckedArgs, interface_target,
+        Function::null_function(), &result_type,
+        /*use_unchecked_entry=*/true, &call_site_attributes,
+        result_type.ReceiverNotInt());
+  }
+
+  return instructions;
+}
+
+Fragment StreamingFlowGraphBuilder::BuildEqualsNull(TokenPosition* p) {
+  const TokenPosition position = ReadPosition();  // read position.
+  if (p != nullptr) *p = position;
+  Fragment instructions;
+  instructions += BuildExpression();  // read expression.
+  instructions += NullConstant();
+  if (parsed_function()->function().is_debuggable()) {
+    instructions += DebugStepCheck(position);
+  }
+  instructions +=
+      StrictCompare(position, Token::kEQ_STRICT, /*number_check=*/false);
+  return instructions;
+}
+
 Fragment StreamingFlowGraphBuilder::BuildSuperMethodInvocation(
     TokenPosition* p) {
   const intptr_t offset = ReaderOffset() - 1;     // Include the tag.
diff --git a/runtime/vm/compiler/frontend/kernel_binary_flowgraph.h b/runtime/vm/compiler/frontend/kernel_binary_flowgraph.h
index 47f5bca..c11dc7d 100644
--- a/runtime/vm/compiler/frontend/kernel_binary_flowgraph.h
+++ b/runtime/vm/compiler/frontend/kernel_binary_flowgraph.h
@@ -274,7 +274,13 @@
   Fragment BuildVariableSetImpl(TokenPosition position,
                                 intptr_t variable_kernel_position);
   Fragment BuildPropertyGet(TokenPosition* position);
+  Fragment BuildInstanceGet(TokenPosition* position);
+  Fragment BuildDynamicGet(TokenPosition* position);
+  Fragment BuildInstanceTearOff(TokenPosition* position);
+  Fragment BuildFunctionTearOff(TokenPosition* position);
   Fragment BuildPropertySet(TokenPosition* position);
+  Fragment BuildInstanceSet(TokenPosition* position);
+  Fragment BuildDynamicSet(TokenPosition* position);
   Fragment BuildAllocateInvocationMirrorCall(TokenPosition position,
                                              const String& name,
                                              intptr_t num_type_arguments,
@@ -286,7 +292,11 @@
   Fragment BuildSuperPropertySet(TokenPosition* position);
   Fragment BuildStaticGet(TokenPosition* position);
   Fragment BuildStaticSet(TokenPosition* position);
-  Fragment BuildMethodInvocation(TokenPosition* position);
+  Fragment BuildMethodInvocation(TokenPosition* position, Tag tag);
+  Fragment BuildLocalFunctionInvocation(TokenPosition* position);
+  Fragment BuildFunctionInvocation(TokenPosition* position);
+  Fragment BuildEqualsCall(TokenPosition* position);
+  Fragment BuildEqualsNull(TokenPosition* position);
   Fragment BuildSuperMethodInvocation(TokenPosition* position);
   Fragment BuildStaticInvocation(TokenPosition* position);
   Fragment BuildConstructorInvocation(TokenPosition* position);
diff --git a/runtime/vm/compiler/frontend/kernel_fingerprints.cc b/runtime/vm/compiler/frontend/kernel_fingerprints.cc
index 5d5890f..4b0426c 100644
--- a/runtime/vm/compiler/frontend/kernel_fingerprints.cc
+++ b/runtime/vm/compiler/frontend/kernel_fingerprints.cc
@@ -379,6 +379,32 @@
       BuildHash(ReadNameAsGetterName().Hash());  // read name.
       CalculateGetterNameFingerprint();  // read interface_target_reference.
       return;
+    case kInstanceGet:
+      ReadByte();                                // read kind.
+      ReadPosition();                            // read position.
+      CalculateExpressionFingerprint();          // read receiver.
+      BuildHash(ReadNameAsGetterName().Hash());  // read name.
+      SkipDartType();                            // read result_type.
+      CalculateGetterNameFingerprint();  // read interface_target_reference.
+      return;
+    case kDynamicGet:
+      ReadByte();                                // read kind.
+      ReadPosition();                            // read position.
+      CalculateExpressionFingerprint();          // read receiver.
+      BuildHash(ReadNameAsGetterName().Hash());  // read name.
+      return;
+    case kInstanceTearOff:
+      ReadByte();                                // read kind.
+      ReadPosition();                            // read position.
+      CalculateExpressionFingerprint();          // read receiver.
+      BuildHash(ReadNameAsGetterName().Hash());  // read name.
+      SkipDartType();                            // read result_type.
+      CalculateGetterNameFingerprint();  // read interface_target_reference.
+      return;
+    case kFunctionTearOff:
+      ReadPosition();                    // read position.
+      CalculateExpressionFingerprint();  // read receiver.
+      return;
     case kPropertySet:
       ReadPosition();                            // read position.
       CalculateExpressionFingerprint();          // read receiver.
@@ -386,6 +412,21 @@
       CalculateExpressionFingerprint();          // read value.
       CalculateSetterNameFingerprint();  // read interface_target_reference.
       return;
+    case kInstanceSet:
+      ReadByte();                                // read kind.
+      ReadPosition();                            // read position.
+      CalculateExpressionFingerprint();          // read receiver.
+      BuildHash(ReadNameAsSetterName().Hash());  // read name.
+      CalculateExpressionFingerprint();          // read value.
+      CalculateSetterNameFingerprint();  // read interface_target_reference.
+      return;
+    case kDynamicSet:
+      ReadByte();                                // read kind.
+      ReadPosition();                            // read position.
+      CalculateExpressionFingerprint();          // read receiver.
+      BuildHash(ReadNameAsSetterName().Hash());  // read name.
+      CalculateExpressionFingerprint();          // read value.
+      return;
     case kSuperPropertyGet:
       ReadPosition();                            // read position.
       BuildHash(ReadNameAsGetterName().Hash());  // read name.
@@ -414,6 +455,48 @@
       CalculateArgumentsFingerprint();           // read arguments.
       CalculateMethodNameFingerprint();  // read interface_target_reference.
       return;
+    case kInstanceInvocation:
+      ReadByte();                                // read kind.
+      ReadFlags();                               // read flags.
+      ReadPosition();                            // read position.
+      CalculateExpressionFingerprint();          // read receiver.
+      BuildHash(ReadNameAsMethodName().Hash());  // read name.
+      CalculateArgumentsFingerprint();           // read arguments.
+      SkipDartType();                            // read function_type.
+      CalculateMethodNameFingerprint();  // read interface_target_reference.
+      return;
+    case kDynamicInvocation:
+      ReadByte();                                // read kind.
+      ReadPosition();                            // read position.
+      CalculateExpressionFingerprint();          // read receiver.
+      BuildHash(ReadNameAsMethodName().Hash());  // read name.
+      CalculateArgumentsFingerprint();           // read arguments.
+      return;
+    case kLocalFunctionInvocation:
+      ReadPosition();                   // read position.
+      ReadUInt();                       // read variable kernel position.
+      ReadUInt();                       // read relative variable index.
+      CalculateArgumentsFingerprint();  // read arguments.
+      SkipDartType();                   // read function_type.
+      return;
+    case kFunctionInvocation:
+      BuildHash(ReadByte());             // read kind.
+      ReadPosition();                    // read position.
+      CalculateExpressionFingerprint();  // read receiver.
+      CalculateArgumentsFingerprint();   // read arguments.
+      SkipDartType();                    // read function_type.
+      return;
+    case kEqualsCall:
+      ReadPosition();                    // read position.
+      CalculateExpressionFingerprint();  // read left.
+      CalculateExpressionFingerprint();  // read right.
+      SkipDartType();                    // read function_type.
+      CalculateMethodNameFingerprint();  // read interface_target_reference.
+      return;
+    case kEqualsNull:
+      ReadPosition();                    // read position.
+      CalculateExpressionFingerprint();  // read expression.
+      return;
     case kSuperMethodInvocation:
       ReadPosition();                            // read position.
       BuildHash(ReadNameAsMethodName().Hash());  // read name.
@@ -558,15 +641,13 @@
     case kConstSetLiteral:
     case kConstMapLiteral:
     case kSymbolLiteral:
-      // Const invocations and const literals are removed by the
-      // constant evaluator.
     case kListConcatenation:
     case kSetConcatenation:
     case kMapConcatenation:
     case kInstanceCreation:
     case kFileUriExpression:
-      // Collection concatenation, instance creation operations and
-      // in-expression URI changes are internal to the front end and
+    case kStaticTearOff:
+      // These nodes are internal to the front end and
       // removed by the constant evaluator.
     default:
       ReportUnexpectedTag("expression", tag);
diff --git a/runtime/vm/compiler/frontend/kernel_translation_helper.cc b/runtime/vm/compiler/frontend/kernel_translation_helper.cc
index f786a81..8dd8f8a 100644
--- a/runtime/vm/compiler/frontend/kernel_translation_helper.cc
+++ b/runtime/vm/compiler/frontend/kernel_translation_helper.cc
@@ -2315,6 +2315,32 @@
       SkipName();                    // read name.
       SkipInterfaceMemberNameReference();  // read interface_target_reference.
       return;
+    case kInstanceGet:
+      ReadByte();                          // read kind.
+      ReadPosition();                      // read position.
+      SkipExpression();                    // read receiver.
+      SkipName();                          // read name.
+      SkipDartType();                      // read result_type.
+      SkipInterfaceMemberNameReference();  // read interface_target_reference.
+      return;
+    case kDynamicGet:
+      ReadByte();        // read kind.
+      ReadPosition();    // read position.
+      SkipExpression();  // read receiver.
+      SkipName();        // read name.
+      return;
+    case kInstanceTearOff:
+      ReadByte();                          // read kind.
+      ReadPosition();                      // read position.
+      SkipExpression();                    // read receiver.
+      SkipName();                          // read name.
+      SkipDartType();                      // read result_type.
+      SkipInterfaceMemberNameReference();  // read interface_target_reference.
+      return;
+    case kFunctionTearOff:
+      ReadPosition();    // read position.
+      SkipExpression();  // read receiver.
+      return;
     case kPropertySet:
       ReadPosition();                // read position.
       SkipExpression();              // read receiver.
@@ -2322,6 +2348,21 @@
       SkipExpression();              // read value.
       SkipInterfaceMemberNameReference();  // read interface_target_reference.
       return;
+    case kInstanceSet:
+      ReadByte();                          // read kind.
+      ReadPosition();                      // read position.
+      SkipExpression();                    // read receiver.
+      SkipName();                          // read name.
+      SkipExpression();                    // read value.
+      SkipInterfaceMemberNameReference();  // read interface_target_reference.
+      return;
+    case kDynamicSet:
+      ReadByte();        // read kind.
+      ReadPosition();    // read position.
+      SkipExpression();  // read receiver.
+      SkipName();        // read name.
+      SkipExpression();  // read value.
+      return;
     case kSuperPropertyGet:
       ReadPosition();                // read position.
       SkipName();                    // read name.
@@ -2350,6 +2391,48 @@
       SkipArguments();               // read arguments.
       SkipInterfaceMemberNameReference();  // read interface_target_reference.
       return;
+    case kInstanceInvocation:
+      ReadByte();                          // read kind.
+      ReadFlags();                         // read flags.
+      ReadPosition();                      // read position.
+      SkipExpression();                    // read receiver.
+      SkipName();                          // read name.
+      SkipArguments();                     // read arguments.
+      SkipDartType();                      // read function_type.
+      SkipInterfaceMemberNameReference();  // read interface_target_reference.
+      return;
+    case kDynamicInvocation:
+      ReadByte();        // read kind.
+      ReadPosition();    // read position.
+      SkipExpression();  // read receiver.
+      SkipName();        // read name.
+      SkipArguments();   // read arguments.
+      return;
+    case kLocalFunctionInvocation:
+      ReadPosition();   // read position.
+      ReadUInt();       // read variable kernel position.
+      ReadUInt();       // read relative variable index.
+      SkipArguments();  // read arguments.
+      SkipDartType();   // read function_type.
+      return;
+    case kFunctionInvocation:
+      ReadByte();        // read kind.
+      ReadPosition();    // read position.
+      SkipExpression();  // read receiver.
+      SkipArguments();   // read arguments.
+      SkipDartType();    // read function_type.
+      return;
+    case kEqualsCall:
+      ReadPosition();                      // read position.
+      SkipExpression();                    // read left.
+      SkipExpression();                    // read right.
+      SkipDartType();                      // read function_type.
+      SkipInterfaceMemberNameReference();  // read interface_target_reference.
+      return;
+    case kEqualsNull:
+      ReadPosition();    // read position.
+      SkipExpression();  // read expression.
+      return;
     case kSuperMethodInvocation:
       ReadPosition();                // read position.
       SkipName();                    // read name.
@@ -2490,15 +2573,13 @@
     case kConstSetLiteral:
     case kConstMapLiteral:
     case kSymbolLiteral:
-      // Const invocations and const literals are removed by the
-      // constant evaluator.
     case kListConcatenation:
     case kSetConcatenation:
     case kMapConcatenation:
     case kInstanceCreation:
     case kFileUriExpression:
-      // Collection concatenation, instance creation operations and
-      // in-expression URI changes are internal to the front end and
+    case kStaticTearOff:
+      // These nodes are internal to the front end and
       // removed by the constant evaluator.
     default:
       ReportUnexpectedTag("expression", tag);
diff --git a/runtime/vm/compiler/frontend/scope_builder.cc b/runtime/vm/compiler/frontend/scope_builder.cc
index 81730a0..27be5e5 100644
--- a/runtime/vm/compiler/frontend/scope_builder.cc
+++ b/runtime/vm/compiler/frontend/scope_builder.cc
@@ -693,6 +693,34 @@
       // read interface_target_reference.
       helper_.SkipInterfaceMemberNameReference();
       return;
+    case kInstanceGet:
+      helper_.ReadByte();      // read kind.
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      helper_.SkipName();      // read name.
+      helper_.SkipDartType();  // read result_type.
+      // read interface_target_reference.
+      helper_.SkipInterfaceMemberNameReference();
+      return;
+    case kDynamicGet:
+      helper_.ReadByte();      // read kind.
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      helper_.SkipName();      // read name.
+      return;
+    case kInstanceTearOff:
+      helper_.ReadByte();      // read kind.
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      helper_.SkipName();      // read name.
+      helper_.SkipDartType();  // read result_type.
+      // read interface_target_reference.
+      helper_.SkipInterfaceMemberNameReference();
+      return;
+    case kFunctionTearOff:
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      return;
     case kPropertySet:
       helper_.ReadPosition();  // read position.
       VisitExpression();       // read receiver.
@@ -701,6 +729,22 @@
       // read interface_target_reference.
       helper_.SkipInterfaceMemberNameReference();
       return;
+    case kInstanceSet:
+      helper_.ReadByte();      // read kind.
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      helper_.SkipName();      // read name.
+      VisitExpression();       // read value.
+      // read interface_target_reference.
+      helper_.SkipInterfaceMemberNameReference();
+      return;
+    case kDynamicSet:
+      helper_.ReadByte();      // read kind.
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      helper_.SkipName();      // read name.
+      VisitExpression();       // read value.
+      return;
     case kSuperPropertyGet:
       HandleLoadReceiver();
       helper_.ReadPosition();                      // read position.
@@ -732,6 +776,53 @@
       // read interface_target_reference.
       helper_.SkipInterfaceMemberNameReference();
       return;
+    case kInstanceInvocation:
+      helper_.ReadByte();      // read kind.
+      helper_.ReadFlags();     // read flags.
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      helper_.SkipName();      // read name.
+      VisitArguments();        // read arguments.
+      helper_.SkipDartType();  // read function_type.
+      // read interface_target_reference.
+      helper_.SkipInterfaceMemberNameReference();
+      return;
+    case kDynamicInvocation:
+      helper_.ReadByte();      // read kind.
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      helper_.SkipName();      // read name.
+      VisitArguments();        // read arguments.
+      return;
+    case kLocalFunctionInvocation: {
+      helper_.ReadPosition();  // read position.
+      intptr_t variable_kernel_offset =
+          helper_.ReadUInt();  // read variable kernel position.
+      helper_.ReadUInt();      // read relative variable index.
+      VisitArguments();        // read arguments.
+      helper_.SkipDartType();  // read function_type.
+      VisitVariableGet(variable_kernel_offset);
+      return;
+    }
+    case kFunctionInvocation:
+      helper_.ReadByte();      // read kind.
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read receiver.
+      VisitArguments();        // read arguments.
+      helper_.SkipDartType();  // read function_type.
+      return;
+    case kEqualsCall:
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read left.
+      VisitExpression();       // read right.
+      helper_.SkipDartType();  // read function_type.
+      // read interface_target_reference.
+      helper_.SkipInterfaceMemberNameReference();
+      return;
+    case kEqualsNull:
+      helper_.ReadPosition();  // read position.
+      VisitExpression();       // read expression.
+      return;
     case kSuperMethodInvocation:
       HandleLoadReceiver();
       helper_.ReadPosition();  // read position.
@@ -914,15 +1005,13 @@
     case kConstSetLiteral:
     case kConstMapLiteral:
     case kSymbolLiteral:
-      // Const invocations and const literals are removed by the
-      // constant evaluator.
     case kListConcatenation:
     case kSetConcatenation:
     case kMapConcatenation:
     case kInstanceCreation:
     case kFileUriExpression:
-      // Collection concatenation, instance creation operations and
-      // in-expression URI changes are internal to the front end and
+    case kStaticTearOff:
+      // These nodes are internal to the front end and
       // removed by the constant evaluator.
     default:
       ReportUnexpectedTag("expression", tag);
diff --git a/runtime/vm/kernel_binary.h b/runtime/vm/kernel_binary.h
index c7b1fe5..6b6878f 100644
--- a/runtime/vm/kernel_binary.h
+++ b/runtime/vm/kernel_binary.h
@@ -214,6 +214,14 @@
   kIsRequired = 1 << 0,
 };
 
+// Keep in sync with package:kernel/lib/ast.dart
+enum class FunctionAccessKind {
+  kFunction,
+  kFunctionType,
+  kInapplicable,
+  kNullable,
+};
+
 static const int SpecializedIntLiteralBias = 3;
 static const int LibraryCountFieldCountFromEnd = 1;
 static const int KernelFormatVersionOffset = 4;
diff --git a/sdk/BUILD.gn b/sdk/BUILD.gn
index 1390092..15a1abf 100644
--- a/sdk/BUILD.gn
+++ b/sdk/BUILD.gn
@@ -252,18 +252,6 @@
   },
 ]
 
-# This rule copies the pre-built DevTools application to
-# bin/resources/devtools/
-copy_tree_specs += [
-  {
-    target = "copy_prebuilt_devtools"
-    visibility = [ ":create_common_sdk" ]
-    source = "../third_party/devtools/web"
-    dest = "$root_out_dir/dart-sdk/bin/resources/devtools"
-    ignore_patterns = "{}"
-  },
-]
-
 # This loop generates rules to copy libraries to lib/
 foreach(library, _full_sdk_libraries) {
   copy_tree_specs += [
@@ -823,7 +811,6 @@
     ":copy_libraries_dart",
     ":copy_libraries_specification",
     ":copy_license",
-    ":copy_prebuilt_devtools",
     ":copy_readme",
     ":copy_vm_dill_files",
     ":write_dartdoc_options",
diff --git a/sdk/lib/_internal/vm/bin/vmservice_io.dart b/sdk/lib/_internal/vm/bin/vmservice_io.dart
index 833e5a2..d1f8a5d 100644
--- a/sdk/lib/_internal/vm/bin/vmservice_io.dart
+++ b/sdk/lib/_internal/vm/bin/vmservice_io.dart
@@ -43,7 +43,6 @@
 // HTTP server.
 Server? server;
 Future<Server>? serverFuture;
-_DebuggingSession? ddsInstance;
 
 Server _lazyServerBoot() {
   var localServer = server;
@@ -59,90 +58,6 @@
   return localServer;
 }
 
-/// Responsible for launching a DevTools instance when the service is started
-/// via SIGQUIT.
-class _DebuggingSession {
-  Future<bool> start(
-    String host,
-    String port,
-    bool disableServiceAuthCodes,
-    bool enableDevTools,
-  ) async {
-    final dartPath = Uri.parse(Platform.resolvedExecutable);
-    final dartDir = [
-      '', // Include leading '/'
-      ...dartPath.pathSegments.sublist(
-        0,
-        dartPath.pathSegments.length - 1,
-      ),
-    ].join('/');
-
-    final fullSdk = dartDir.endsWith('bin');
-
-    final ddsSnapshot = [
-      dartDir,
-      fullSdk ? 'snapshots' : 'gen',
-      'dds.dart.snapshot',
-    ].join('/');
-
-    final devToolsBinaries = [
-      dartDir,
-      if (fullSdk) 'resources',
-      'devtools',
-    ].join('/');
-
-    const enableLogging = false;
-    _process = await Process.start(
-      dartPath.toString(),
-      [
-        ddsSnapshot,
-        server!.serverAddress!.toString(),
-        host,
-        port,
-        disableServiceAuthCodes.toString(),
-        enableDevTools.toString(),
-        devToolsBinaries,
-        enableLogging.toString(),
-      ],
-      mode: ProcessStartMode.detachedWithStdio,
-    );
-    final completer = Completer<void>();
-    late StreamSubscription stderrSub;
-    stderrSub = _process!.stderr.transform(utf8.decoder).listen((event) {
-      final result = json.decode(event) as Map<String, dynamic>;
-      final state = result['state'];
-      if (state == 'started') {
-        if (result.containsKey('devToolsUri')) {
-          // NOTE: update pkg/dartdev/lib/src/commands/run.dart if this message
-          // is changed to ensure consistency.
-          const devToolsMessagePrefix =
-              'The Dart DevTools debugger and profiler is available at:';
-          final devToolsUri = result['devToolsUri'];
-          print('$devToolsMessagePrefix $devToolsUri');
-        }
-        stderrSub.cancel();
-        completer.complete();
-      } else {
-        stderrSub.cancel();
-        completer.completeError(
-          'Could not start Observatory HTTP server',
-        );
-      }
-    });
-    try {
-      await completer.future;
-      return true;
-    } catch (e) {
-      stderr.write(e);
-      return false;
-    }
-  }
-
-  void shutdown() => _process!.kill();
-
-  Process? _process;
-}
-
 Future cleanupCallback() async {
   // Cancel the sigquit subscription.
   if (_signalSubscription != null) {
@@ -306,6 +221,10 @@
   _server.acceptNewWebSocketConnections = enable;
 }
 
+void _clearFuture(_) {
+  serverFuture = null;
+}
+
 _onSignal(ProcessSignal signal) {
   if (serverFuture != null) {
     // Still waiting.
@@ -314,21 +233,9 @@
   final _server = _lazyServerBoot();
   // Toggle HTTP server.
   if (_server.running) {
-    _server.shutdown(true).then((_) async {
-      ddsInstance?.shutdown();
-      await VMService().clearState();
-      serverFuture = null;
-    });
+    _server.shutdown(true).then(_clearFuture);
   } else {
-    _server.startup().then((_) {
-      ddsInstance = _DebuggingSession()
-        ..start(
-          _server._ip,
-          _server._port.toString(),
-          false,
-          true,
-        );
-    });
+    _server.startup().then(_clearFuture);
   }
 }
 
diff --git a/sdk/lib/_internal/vm/bin/vmservice_server.dart b/sdk/lib/_internal/vm/bin/vmservice_server.dart
index f5742ed..69aa7f8 100644
--- a/sdk/lib/_internal/vm/bin/vmservice_server.dart
+++ b/sdk/lib/_internal/vm/bin/vmservice_server.dart
@@ -26,9 +26,9 @@
     socket.done.then((_) => close());
   }
 
-  Future<void> disconnect() async {
+  disconnect() {
     if (socket != null) {
-      await socket.close();
+      socket.close();
     }
   }
 
@@ -102,8 +102,8 @@
   HttpRequestClient(this.request, VMService service)
       : super(service, sendEvents: false);
 
-  Future<void> disconnect() async {
-    await request.response.close();
+  disconnect() {
+    request.response.close();
     close();
   }
 
diff --git a/sdk/lib/vmservice/vmservice.dart b/sdk/lib/vmservice/vmservice.dart
index d492dcf..a3f7e8b 100644
--- a/sdk/lib/vmservice/vmservice.dart
+++ b/sdk/lib/vmservice/vmservice.dart
@@ -411,16 +411,6 @@
     replyPort.send(bytes);
   }
 
-  Future<void> clearState() async {
-    // Create a copy of the set as a list because client.disconnect() will
-    // alter the connected clients set.
-    final clientsList = clients.toList();
-    for (final client in clientsList) {
-      await client.disconnect();
-    }
-    devfs.cleanup();
-  }
-
   Future _exit() async {
     isExiting = true;
 
@@ -433,7 +423,14 @@
     // Close receive ports.
     isolateControlPort.close();
     scriptLoadPort.close();
-    await clearState();
+
+    // Create a copy of the set as a list because client.disconnect() will
+    // alter the connected clients set.
+    final clientsList = clients.toList();
+    for (final client in clientsList) {
+      client.disconnect();
+    }
+    devfs.cleanup();
     final cleanup = VMServiceEmbedderHooks.cleanup;
     if (cleanup != null) {
       await cleanup();
diff --git a/tests/lib/typed_data/restricted_types_error_test.dart b/tests/lib/typed_data/restricted_types_error_test.dart
new file mode 100644
index 0000000..02b5721
--- /dev/null
+++ b/tests/lib/typed_data/restricted_types_error_test.dart
@@ -0,0 +1,361 @@
+// Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:typed_data';
+
+abstract class CEByteBuffer extends ByteBuffer {}
+//             ^
+// [cfe] 'ByteBuffer' is restricted and can't be extended or implemented.
+//                                  ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIByteBuffer implements ByteBuffer {}
+//             ^
+// [cfe] 'ByteBuffer' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMByteBuffer with ByteBuffer {}
+//             ^
+// [cfe] 'ByteBuffer' is restricted and can't be extended or implemented.
+//                               ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CETypedData extends TypedData {}
+//             ^
+// [cfe] 'TypedData' is restricted and can't be extended or implemented.
+//                                 ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CITypedData implements TypedData {}
+//             ^
+// [cfe] 'TypedData' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMTypedData with TypedData {}
+//             ^
+// [cfe] 'TypedData' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIByteData implements ByteData {}
+//             ^
+// [cfe] 'ByteData' is restricted and can't be extended or implemented.
+//                                   ^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMByteData with ByteData {}
+//             ^
+// [cfe] 'ByteData' is restricted and can't be extended or implemented.
+//                             ^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt8List implements Int8List {}
+//             ^
+// [cfe] 'Int8List' is restricted and can't be extended or implemented.
+//                                   ^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt8List with Int8List {}
+//             ^
+// [cfe] 'Int8List' is restricted and can't be extended or implemented.
+//                             ^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUint8List implements Uint8List {}
+//             ^
+// [cfe] 'Uint8List' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMUint8List with Uint8List {}
+//             ^
+// [cfe] 'Uint8List' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class Uint8CIClampedList implements Uint8ClampedList {}
+//             ^
+// [cfe] 'Uint8ClampedList' is restricted and can't be extended or implemented.
+//                                           ^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class Uint8CMClampedList with Uint8ClampedList {}
+//             ^
+// [cfe] 'Uint8ClampedList' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt16List implements Int16List {}
+//             ^
+// [cfe] 'Int16List' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt16List with Int16List {}
+//             ^
+// [cfe] 'Int16List' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUint16List implements Uint16List {}
+//             ^
+// [cfe] 'Uint16List' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMUint16List with Uint16List {}
+//             ^
+// [cfe] 'Uint16List' is restricted and can't be extended or implemented.
+//                               ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt32List implements Int32List {}
+//             ^
+// [cfe] 'Int32List' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt32List with Int32List {}
+//             ^
+// [cfe] 'Int32List' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUint32List implements Uint32List {}
+//             ^
+// [cfe] 'Uint32List' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMUint32List with Uint32List {}
+//             ^
+// [cfe] 'Uint32List' is restricted and can't be extended or implemented.
+//                               ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt64List implements Int64List {}
+//             ^
+// [cfe] 'Int64List' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt64List with Int64List {}
+//             ^
+// [cfe] 'Int64List' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUint64List implements Uint64List {}
+//             ^
+// [cfe] 'Uint64List' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMUint64List with Uint64List {}
+//             ^
+// [cfe] 'Uint64List' is restricted and can't be extended or implemented.
+//                               ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat32List implements Float32List {}
+//             ^
+// [cfe] 'Float32List' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat32List with Float32List {}
+//             ^
+// [cfe] 'Float32List' is restricted and can't be extended or implemented.
+//                                ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat64List implements Float64List {}
+//             ^
+// [cfe] 'Float64List' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat64List with Float64List {}
+//             ^
+// [cfe] 'Float64List' is restricted and can't be extended or implemented.
+//                                ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt32x4List implements Int32x4List {}
+//             ^
+// [cfe] 'Int32x4List' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt32x4List with Int32x4List {}
+//             ^
+// [cfe] 'Int32x4List' is restricted and can't be extended or implemented.
+//                                ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat32x4List implements Float32x4List {}
+//             ^
+// [cfe] 'Float32x4List' is restricted and can't be extended or implemented.
+//                                        ^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat32x4List with Float32x4List {}
+//             ^
+// [cfe] 'Float32x4List' is restricted and can't be extended or implemented.
+//                                  ^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat64x2List implements Float64x2List {}
+//             ^
+// [cfe] 'Float64x2List' is restricted and can't be extended or implemented.
+//                                        ^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat64x2List with Float64x2List {}
+//             ^
+// [cfe] 'Float64x2List' is restricted and can't be extended or implemented.
+//                                  ^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt32x4 implements Int32x4 {}
+//             ^
+// [cfe] 'Int32x4' is restricted and can't be extended or implemented.
+//                                  ^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt32x4 with Int32x4 {}
+//             ^
+// [cfe] 'Int32x4' is restricted and can't be extended or implemented.
+//                            ^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat32x4 implements Float32x4 {}
+//             ^
+// [cfe] 'Float32x4' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat32x4 with Float32x4 {}
+//             ^
+// [cfe] 'Float32x4' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat64x2 implements Float64x2 {}
+//             ^
+// [cfe] 'Float64x2' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat64x2 with Float64x2 {}
+//             ^
+// [cfe] 'Float64x2' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+// Endian cannot be used as a superclass or mixin.
+
+abstract class CIEndian implements Endian {}
+//             ^
+// [cfe] 'Endian' is restricted and can't be extended or implemented.
+//                                 ^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnByteBufferView implements UnmodifiableByteBufferView {}
+//             ^
+// [cfe] 'UnmodifiableByteBufferView' is restricted and can't be extended or implemented.
+//                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnByteDataView implements UnmodifiableByteDataView {}
+//             ^
+// [cfe] 'UnmodifiableByteDataView' is restricted and can't be extended or implemented.
+//                                         ^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt8LV implements UnmodifiableInt8ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt8ListView' is restricted and can't be extended or implemented.
+//                                   ^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint8LV implements UnmodifiableUint8ListView {}
+//             ^
+// [cfe] 'UnmodifiableUint8ListView' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint8ClampedLV implements UnmodifiableUint8ClampedListView {}
+//             ^
+// [cfe] 'UnmodifiableUint8ClampedListView' is restricted and can't be extended or implemented.
+//                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt16LV implements UnmodifiableInt16ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt16ListView' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint16LV implements UnmodifiableUint16ListView {}
+//             ^
+// [cfe] 'UnmodifiableUint16ListView' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt32LV implements UnmodifiableInt32ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt32ListView' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint32LV implements UnmodifiableUint32ListView {}
+//             ^
+// [cfe] 'UnmodifiableUint32ListView' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt64LV implements UnmodifiableInt64ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt64ListView' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint64LV implements UnmodifiableUint64ListView {}
+//             ^
+// [cfe] 'UnmodifiableUint64ListView' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnFloat32LV implements UnmodifiableFloat32ListView {}
+//             ^
+// [cfe] 'UnmodifiableFloat32ListView' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnFloat64LV implements UnmodifiableFloat64ListView {}
+//             ^
+// [cfe] 'UnmodifiableFloat64ListView' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt32x4LV implements UnmodifiableInt32x4ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt32x4ListView' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnFloat32x4LV implements UnmodifiableFloat32x4ListView {}
+//             ^
+// [cfe] 'UnmodifiableFloat32x4ListView' is restricted and can't be extended or implemented.
+//                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnFloat64x2LV implements UnmodifiableFloat64x2ListView {}
+//             ^
+// [cfe] 'UnmodifiableFloat64x2ListView' is restricted and can't be extended or implemented.
+//                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
diff --git a/tests/lib_2/typed_data/restricted_types_error_test.dart b/tests/lib_2/typed_data/restricted_types_error_test.dart
new file mode 100644
index 0000000..02b5721
--- /dev/null
+++ b/tests/lib_2/typed_data/restricted_types_error_test.dart
@@ -0,0 +1,361 @@
+// Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:typed_data';
+
+abstract class CEByteBuffer extends ByteBuffer {}
+//             ^
+// [cfe] 'ByteBuffer' is restricted and can't be extended or implemented.
+//                                  ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIByteBuffer implements ByteBuffer {}
+//             ^
+// [cfe] 'ByteBuffer' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMByteBuffer with ByteBuffer {}
+//             ^
+// [cfe] 'ByteBuffer' is restricted and can't be extended or implemented.
+//                               ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CETypedData extends TypedData {}
+//             ^
+// [cfe] 'TypedData' is restricted and can't be extended or implemented.
+//                                 ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CITypedData implements TypedData {}
+//             ^
+// [cfe] 'TypedData' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMTypedData with TypedData {}
+//             ^
+// [cfe] 'TypedData' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIByteData implements ByteData {}
+//             ^
+// [cfe] 'ByteData' is restricted and can't be extended or implemented.
+//                                   ^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMByteData with ByteData {}
+//             ^
+// [cfe] 'ByteData' is restricted and can't be extended or implemented.
+//                             ^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt8List implements Int8List {}
+//             ^
+// [cfe] 'Int8List' is restricted and can't be extended or implemented.
+//                                   ^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt8List with Int8List {}
+//             ^
+// [cfe] 'Int8List' is restricted and can't be extended or implemented.
+//                             ^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUint8List implements Uint8List {}
+//             ^
+// [cfe] 'Uint8List' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMUint8List with Uint8List {}
+//             ^
+// [cfe] 'Uint8List' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class Uint8CIClampedList implements Uint8ClampedList {}
+//             ^
+// [cfe] 'Uint8ClampedList' is restricted and can't be extended or implemented.
+//                                           ^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class Uint8CMClampedList with Uint8ClampedList {}
+//             ^
+// [cfe] 'Uint8ClampedList' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt16List implements Int16List {}
+//             ^
+// [cfe] 'Int16List' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt16List with Int16List {}
+//             ^
+// [cfe] 'Int16List' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUint16List implements Uint16List {}
+//             ^
+// [cfe] 'Uint16List' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMUint16List with Uint16List {}
+//             ^
+// [cfe] 'Uint16List' is restricted and can't be extended or implemented.
+//                               ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt32List implements Int32List {}
+//             ^
+// [cfe] 'Int32List' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt32List with Int32List {}
+//             ^
+// [cfe] 'Int32List' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUint32List implements Uint32List {}
+//             ^
+// [cfe] 'Uint32List' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMUint32List with Uint32List {}
+//             ^
+// [cfe] 'Uint32List' is restricted and can't be extended or implemented.
+//                               ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt64List implements Int64List {}
+//             ^
+// [cfe] 'Int64List' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt64List with Int64List {}
+//             ^
+// [cfe] 'Int64List' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUint64List implements Uint64List {}
+//             ^
+// [cfe] 'Uint64List' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMUint64List with Uint64List {}
+//             ^
+// [cfe] 'Uint64List' is restricted and can't be extended or implemented.
+//                               ^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat32List implements Float32List {}
+//             ^
+// [cfe] 'Float32List' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat32List with Float32List {}
+//             ^
+// [cfe] 'Float32List' is restricted and can't be extended or implemented.
+//                                ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat64List implements Float64List {}
+//             ^
+// [cfe] 'Float64List' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat64List with Float64List {}
+//             ^
+// [cfe] 'Float64List' is restricted and can't be extended or implemented.
+//                                ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt32x4List implements Int32x4List {}
+//             ^
+// [cfe] 'Int32x4List' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt32x4List with Int32x4List {}
+//             ^
+// [cfe] 'Int32x4List' is restricted and can't be extended or implemented.
+//                                ^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat32x4List implements Float32x4List {}
+//             ^
+// [cfe] 'Float32x4List' is restricted and can't be extended or implemented.
+//                                        ^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat32x4List with Float32x4List {}
+//             ^
+// [cfe] 'Float32x4List' is restricted and can't be extended or implemented.
+//                                  ^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat64x2List implements Float64x2List {}
+//             ^
+// [cfe] 'Float64x2List' is restricted and can't be extended or implemented.
+//                                        ^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat64x2List with Float64x2List {}
+//             ^
+// [cfe] 'Float64x2List' is restricted and can't be extended or implemented.
+//                                  ^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIInt32x4 implements Int32x4 {}
+//             ^
+// [cfe] 'Int32x4' is restricted and can't be extended or implemented.
+//                                  ^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMInt32x4 with Int32x4 {}
+//             ^
+// [cfe] 'Int32x4' is restricted and can't be extended or implemented.
+//                            ^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat32x4 implements Float32x4 {}
+//             ^
+// [cfe] 'Float32x4' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat32x4 with Float32x4 {}
+//             ^
+// [cfe] 'Float32x4' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIFloat64x2 implements Float64x2 {}
+//             ^
+// [cfe] 'Float64x2' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CMFloat64x2 with Float64x2 {}
+//             ^
+// [cfe] 'Float64x2' is restricted and can't be extended or implemented.
+//                              ^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+// Endian cannot be used as a superclass or mixin.
+
+abstract class CIEndian implements Endian {}
+//             ^
+// [cfe] 'Endian' is restricted and can't be extended or implemented.
+//                                 ^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnByteBufferView implements UnmodifiableByteBufferView {}
+//             ^
+// [cfe] 'UnmodifiableByteBufferView' is restricted and can't be extended or implemented.
+//                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnByteDataView implements UnmodifiableByteDataView {}
+//             ^
+// [cfe] 'UnmodifiableByteDataView' is restricted and can't be extended or implemented.
+//                                         ^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt8LV implements UnmodifiableInt8ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt8ListView' is restricted and can't be extended or implemented.
+//                                   ^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint8LV implements UnmodifiableUint8ListView {}
+//             ^
+// [cfe] 'UnmodifiableUint8ListView' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint8ClampedLV implements UnmodifiableUint8ClampedListView {}
+//             ^
+// [cfe] 'UnmodifiableUint8ClampedListView' is restricted and can't be extended or implemented.
+//                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt16LV implements UnmodifiableInt16ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt16ListView' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint16LV implements UnmodifiableUint16ListView {}
+//             ^
+// [cfe] 'UnmodifiableUint16ListView' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt32LV implements UnmodifiableInt32ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt32ListView' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint32LV implements UnmodifiableUint32ListView {}
+//             ^
+// [cfe] 'UnmodifiableUint32ListView' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt64LV implements UnmodifiableInt64ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt64ListView' is restricted and can't be extended or implemented.
+//                                    ^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnUint64LV implements UnmodifiableUint64ListView {}
+//             ^
+// [cfe] 'UnmodifiableUint64ListView' is restricted and can't be extended or implemented.
+//                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnFloat32LV implements UnmodifiableFloat32ListView {}
+//             ^
+// [cfe] 'UnmodifiableFloat32ListView' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnFloat64LV implements UnmodifiableFloat64ListView {}
+//             ^
+// [cfe] 'UnmodifiableFloat64ListView' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnInt32x4LV implements UnmodifiableInt32x4ListView {}
+//             ^
+// [cfe] 'UnmodifiableInt32x4ListView' is restricted and can't be extended or implemented.
+//                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnFloat32x4LV implements UnmodifiableFloat32x4ListView {}
+//             ^
+// [cfe] 'UnmodifiableFloat32x4ListView' is restricted and can't be extended or implemented.
+//                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
+
+abstract class CIUnFloat64x2LV implements UnmodifiableFloat64x2ListView {}
+//             ^
+// [cfe] 'UnmodifiableFloat64x2ListView' is restricted and can't be extended or implemented.
+//                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+// [analyzer] COMPILE_TIME_ERROR.SUBTYPE_OF_DISALLOWED_TYPE
diff --git a/third_party/devtools/update.sh b/third_party/devtools/update.sh
index 077d758..a69f6ee 100755
--- a/third_party/devtools/update.sh
+++ b/third_party/devtools/update.sh
@@ -30,11 +30,12 @@
 # to serve from DDS.
 mkdir cipd_package
 cp -R packages/devtools/build/ cipd_package/web
+cp -r packages/devtools_server cipd_package
 cp -r packages/devtools_shared cipd_package
 
 cipd create \
   -name dart/third_party/flutter/devtools \
   -in cipd_package \
   -install-mode copy \
-  -tag git_revision:$1
+  -tag revision:$1
 
diff --git a/tools/VERSION b/tools/VERSION
index f487dbc..22a5d08 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
 MAJOR 2
 MINOR 14
 PATCH 0
-PRERELEASE 84
+PRERELEASE 85
 PRERELEASE_PATCH 0
\ No newline at end of file
diff --git a/tools/bots/test_matrix.json b/tools/bots/test_matrix.json
index bfa020b..bf63fe3 100644
--- a/tools/bots/test_matrix.json
+++ b/tools/bots/test_matrix.json
@@ -322,7 +322,6 @@
       "xcodebuild/ReleaseSIMARM64C/",
       "xcodebuild/ReleaseX64/",
       "xcodebuild/ReleaseX64C/",
-      "pkg/",
       "samples/",
       "samples_2/",
       "samples-dev/",
@@ -330,7 +329,6 @@
       "third_party/android_tools/sdk/platform-tools/adb",
       "third_party/android_tools/ndk/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android-strip",
       "third_party/android_tools/ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-strip",
-      "third_party/devtools/",
       "third_party/webdriver/",
       "third_party/pkg/",
       "third_party/pkg_tested/",
@@ -3381,6 +3379,21 @@
       },
       "steps": [
         {
+          "name": "validate pkg/ pubspec files",
+          "script": "tools/sdks/dart-sdk/bin/dart",
+          "arguments": [
+            "tools/package_deps/bin/package_deps.dart"
+          ]
+        },
+        {
+          "name": "validate .dart_tool/package_config.json",
+          "script": "tools/sdks/dart-sdk/bin/dart",
+          "arguments": [
+            "tools/generate_package_config.dart",
+            "--check"
+          ]
+        },
+        {
           "name": "build dart",
           "script": "tools/build.py",
           "arguments": [
@@ -3389,13 +3402,6 @@
           ]
         },
         {
-          "name": "validate pkg/ pubspec files",
-          "script": "out/ReleaseX64/dart-sdk/bin/dart",
-          "arguments": [
-            "tools/package_deps/bin/package_deps.dart"
-          ]
-        },
-        {
           "name": "validate SDK API docs",
           "script": "out/ReleaseX64/dart-sdk/bin/dartdoc",
           "arguments": [
diff --git a/tools/generate_package_config.dart b/tools/generate_package_config.dart
index 4cf47e0..8d4ed5b 100644
--- a/tools/generate_package_config.dart
+++ b/tools/generate_package_config.dart
@@ -57,8 +57,6 @@
     packageDirectory(
         'runtime/observatory_2/tests/service_2/observatory_test_package_2'),
     packageDirectory('sdk/lib/_internal/sdk_library_metadata'),
-    packageDirectory('third_party/devtools/devtools_server'),
-    packageDirectory('third_party/devtools/devtools_shared'),
     packageDirectory('third_party/pkg/protobuf/protobuf'),
     packageDirectory('tools/package_deps'),
   ];
@@ -104,7 +102,8 @@
       exit(0);
     } else {
       print("Package config out of date");
-      print("Run `dart tools/generate_package_config.dart` to update");
+      print("Run `gclient sync -D && dart tools/generate_package_config.dart` "
+          "to update.");
       exit(1);
     }
   }
diff --git a/tools/spec_parser/Dart.g b/tools/spec_parser/Dart.g
index 0da4bd2..f166720 100644
--- a/tools/spec_parser/Dart.g
+++ b/tools/spec_parser/Dart.g
@@ -1120,7 +1120,7 @@
     ;
 
 partHeader
-    :    metadata PART OF identifier ('.' identifier)* ';'
+    :    metadata PART OF (dottedIdentifierList | uri)';'
     ;
 
 partDeclaration
diff --git a/utils/dartdev/BUILD.gn b/utils/dartdev/BUILD.gn
index 3ce3bc3..7f33d99 100644
--- a/utils/dartdev/BUILD.gn
+++ b/utils/dartdev/BUILD.gn
@@ -2,14 +2,12 @@
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
-import("../../build/dart/copy_tree.gni")
 import("../application_snapshot.gni")
 
 group("dartdev") {
   public_deps = [
     ":copy_dartdev_kernel",
     ":copy_dartdev_snapshot",
-    ":copy_prebuilt_devtools",
   ]
 }
 
@@ -41,15 +39,3 @@
   deps = [ "../dds:dds" ]
   output = "$root_gen_dir/dartdev.dart.snapshot"
 }
-
-copy_trees("copy_prebuilt_devtools") {
-  sources = [
-    {
-      target = "copy_prebuilt_devtools"
-      visibility = [ ":dartdev" ]
-      source = "../../third_party/devtools/web"
-      dest = "$root_out_dir/devtools"
-      ignore_patterns = "{}"
-    },
-  ]
-}