diff --git a/pkg/oauth2/lib/src/client.dart b/pkg/oauth2/lib/src/client.dart
index ec8dda5..62e2288 100644
--- a/pkg/oauth2/lib/src/client.dart
+++ b/pkg/oauth2/lib/src/client.dart
@@ -109,7 +109,8 @@
       if (!params.containsKey('error')) return response;
 
       throw new AuthorizationException(
-          params['error'], params['error_description'], params['error_uri']);
+          params['error'], params['error_description'],
+          params['error_uri'] == null ? null : Uri.parse(params['error_uri']));
     });
   }
 
diff --git a/pkg/oauth2/test/client_test.dart b/pkg/oauth2/test/client_test.dart
index bac0548..7a05e99 100644
--- a/pkg/oauth2/test/client_test.dart
+++ b/pkg/oauth2/test/client_test.dart
@@ -25,12 +25,6 @@
   httpClient = new ExpectClient();
 }
 
-void expectFutureThrows(future, predicate) {
-  future.catchError(expectAsync1((error) {
-    expect(predicate(error), isTrue);
-  }));
-}
-
 void main() {
   group('with expired credentials', () {
     setUp(createHttpClient);
@@ -42,8 +36,8 @@
       var client = new oauth2.Client('identifier', 'secret', credentials,
           httpClient: httpClient);
 
-      expectFutureThrows(client.get(requestUri),
-                         (e) => e is oauth2.ExpirationException);
+      expect(client.get(requestUri),
+          throwsA(new isInstanceOf<oauth2.ExpirationException>()));
     });
 
     test("that can be refreshed refreshes the credentials and sends the "
@@ -123,8 +117,7 @@
       var client = new oauth2.Client('identifier', 'secret', credentials,
           httpClient: httpClient);
 
-      expectFutureThrows(client.refreshCredentials(),
-                         (e) => e is StateError);
+      expect(client.refreshCredentials(), throwsA(isStateError));
     });
   });
 
@@ -148,8 +141,8 @@
                 headers: {'www-authenticate': authenticate}));
       });
 
-      expectFutureThrows(client.read(requestUri),
-                         (e) => e is oauth2.AuthorizationException);
+      expect(client.read(requestUri),
+          throwsA(new isInstanceOf<oauth2.AuthorizationException>()));
     });
 
     test('passes through a 401 response without www-authenticate', () {
diff --git a/pkg/scheduled_test/lib/src/schedule.dart b/pkg/scheduled_test/lib/src/schedule.dart
index d5eb9af..06064c5 100644
--- a/pkg/scheduled_test/lib/src/schedule.dart
+++ b/pkg/scheduled_test/lib/src/schedule.dart
@@ -111,14 +111,6 @@
   /// The timer for keeping track of task timeouts. This may be null.
   Timer _timeoutTimer;
 
-  /// If `true`, then new [Task]s will capture the current stack trace before
-  /// running. This can be set to `false` to speed up running tests since
-  /// capturing stack traces is currently quite slow. Even when set to `false`,
-  /// stack traces from *thrown* exceptions will be caught. This only disables
-  /// the eager collection of stack traces *before* an error occurs. Defaults
-  /// to `true`.
-  bool captureStackTraces = true;
-
   /// Creates a new schedule with empty task queues.
   Schedule() {
     _tasks = new TaskQueue._("tasks", this);
@@ -354,10 +346,6 @@
   /// The name of the queue, for debugging purposes.
   final String name;
 
-  /// If `true`, then new [Task]s in this queue will capture the current stack
-  /// trace before running.
-  bool get captureStackTraces => _schedule.captureStackTraces;
-
   /// The [Schedule] that created this queue.
   final Schedule _schedule;
 
@@ -379,9 +367,9 @@
 
   /// The descriptions of all callbacks that are blocking the completion of
   /// [this].
-  List<String> get pendingCallbacks =>
-      new UnmodifiableListView<String>(_pendingCallbacks);
-  final _pendingCallbacks = new Queue<String>();
+  List<PendingCallback> get pendingCallbacks =>
+      new UnmodifiableListView<PendingCallback>(_pendingCallbacks);
+  final _pendingCallbacks = new Queue<PendingCallback>();
 
   /// A completer that will be completed once [_pendingCallbacks] becomes empty
   /// after the queue finishes running its tasks.
@@ -505,18 +493,19 @@
     bool _timedOut() =>
       _schedule.currentQueue != this || pendingCallbacks.isEmpty;
 
-    if (description == null) {
-      description = "Out-of-band operation #${_totalCallbacks}";
-    }
-
-    if (captureStackTraces) {
-      var stackString = prefixLines(terseTraceString(new Trace.current()));
-      description += "\n\nStack trace:\n$stackString";
-    }
-
     _totalCallbacks++;
+    var trace = new Trace.current();
+    var pendingCallback = new PendingCallback._(() {
+      var fullDescription = description;
+      if (fullDescription == null) {
+        fullDescription = "Out-of-band operation #${_totalCallbacks}";
+      }
 
-    _pendingCallbacks.add(description);
+      var stackString = prefixLines(terseTraceString(trace));
+      fullDescription += "\n\nStack trace:\n$stackString";
+    });
+    _pendingCallbacks.add(pendingCallback);
+
     return (arg) {
       try {
         return fn(arg);
@@ -531,7 +520,7 @@
       } finally {
         if (_timedOut()) return;
 
-        _pendingCallbacks.remove(description);
+        _pendingCallbacks.remove(pendingCallback);
         if (_pendingCallbacks.isEmpty && !isRunningTasks) {
           _noPendingCallbacksCompleter.complete();
         }
@@ -605,3 +594,22 @@
     }).join("\n");
   }
 }
+
+/// A thunk for lazily resolving the description of a [PendingCallback].
+typedef String _DescriptionThunk();
+
+/// An identifier for an out-of-band callback running during a schedule.
+class PendingCallback {
+  final _DescriptionThunk _thunk;
+  String _description;
+
+  /// The string description of the callback.
+  String get description {
+    if (_description == null) _description = _thunk();
+    return _description;
+  }
+
+  String toString() => description;
+
+  PendingCallback._(this._thunk);
+}
diff --git a/pkg/scheduled_test/lib/src/schedule_error.dart b/pkg/scheduled_test/lib/src/schedule_error.dart
index 09bb350..910e4f5 100644
--- a/pkg/scheduled_test/lib/src/schedule_error.dart
+++ b/pkg/scheduled_test/lib/src/schedule_error.dart
@@ -33,7 +33,7 @@
 
   /// The descriptions of out-of-band callbacks that were pending when this
   /// error occurred.
-  final Iterable<String> pendingCallbacks;
+  final Iterable<PendingCallback> pendingCallbacks;
 
   /// The state of the schedule at the time the error was detected.
   final ScheduleState _stateWhenDetected;
@@ -54,10 +54,7 @@
       stackTrace = attachedTrace;
     }
 
-    if (schedule.captureStackTraces && stackTrace == null) {
-      stackTrace = new Trace.current();
-    }
-
+    if (stackTrace == null) stackTrace = new Trace.current();
     return new ScheduleError(schedule, error, stackTrace);
   }
 
@@ -69,7 +66,7 @@
         schedule = schedule,
         task = schedule.currentTask,
         queue = schedule.currentQueue,
-        pendingCallbacks = schedule.currentQueue == null ? <String>[]
+        pendingCallbacks = schedule.currentQueue == null ? <PendingCallback>[]
             : schedule.currentQueue.pendingCallbacks.toList(),
         _stateWhenDetected = schedule.state;
 
@@ -112,7 +109,7 @@
       result.write("\n\n");
       result.writeln("Pending out-of-band callbacks:");
       for (var callback in pendingCallbacks) {
-        result.writeln(prefixLines(callback, firstPrefix: "* "));
+        result.writeln(prefixLines(callback.toString(), firstPrefix: "* "));
       }
     }
 
diff --git a/pkg/scheduled_test/lib/src/task.dart b/pkg/scheduled_test/lib/src/task.dart
index 2dfc127..44f6833 100644
--- a/pkg/scheduled_test/lib/src/task.dart
+++ b/pkg/scheduled_test/lib/src/task.dart
@@ -72,7 +72,7 @@
 
   Task._(fn(), this.description, TaskQueue queue, this.parent, this._id)
       : queue = queue,
-        stackTrace = queue.captureStackTraces ? new Trace.current() : null {
+        stackTrace = new Trace.current() {
     this.fn = () {
       if (state != TaskState.WAITING) {
         throw new StateError("Can't run $state task '$this'.");
diff --git a/pkg/scheduled_test/test/scheduled_test/capture_stack_traces_test.dart b/pkg/scheduled_test/test/scheduled_test/capture_stack_traces_test.dart
deleted file mode 100644
index 25bba20..0000000
--- a/pkg/scheduled_test/test/scheduled_test/capture_stack_traces_test.dart
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright (c) 2013, 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:async';
-import 'dart:io' hide sleep;
-
-import 'package:scheduled_test/scheduled_test.dart';
-
-import '../metatest.dart';
-import '../utils.dart';
-
-void main() {
-  setUpTimeout();
-
-  expectTestsPass('error includes a stack trace by default', () {
-    var error;
-    test('test 1', () {
-      currentSchedule.onComplete.schedule(() {
-        error = currentSchedule.errors.first;
-      });
-
-      schedule(() => throw 'error');
-    });
-
-    test('test 2', () {
-      // There should be two stack traces: one for the thrown error, and one
-      // for the failed task (which is the captured one).
-      expect(error.toString(),
-          stringContainsInOrder(['Stack trace:', 'Stack trace:']));
-    });
-  }, passing: ['test 2']);
-
-  expectTestsPass('does not capture a stack trace if set to false', () {
-    var errorThrown = new Object();
-    var error;
-    test('test 1', () {
-      currentSchedule.captureStackTraces = false;
-      currentSchedule.onComplete.schedule(() {
-        error = currentSchedule.errors.first;
-      });
-
-      schedule(() => throw errorThrown);
-    });
-
-    test('test 2', () {
-      // There should only be the stack trace for the thrown exception, but no
-      // captured trace for the failed task.
-      var numStackTraces = 'Stack trace:'.allMatches(error.toString()).length;
-      expect(numStackTraces, equals(1));
-    });
-  }, passing: ['test 2']);
-}
diff --git a/pkg/stack_trace/lib/src/lazy_trace.dart b/pkg/stack_trace/lib/src/lazy_trace.dart
new file mode 100644
index 0000000..8c44829
--- /dev/null
+++ b/pkg/stack_trace/lib/src/lazy_trace.dart
@@ -0,0 +1,34 @@
+// Copyright (c) 2013, 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.
+
+library lazy_trace;
+
+import 'frame.dart';
+import 'trace.dart';
+
+/// A thunk for lazily constructing a [Trace].
+typedef Trace TraceThunk();
+
+/// A wrapper around a [TraceThunk]. This works around issue 9579 by avoiding
+/// the conversion of native [StackTrace]s to strings until it's absolutely
+/// necessary.
+class LazyTrace implements Trace {
+  final TraceThunk _thunk;
+  Trace _inner;
+
+  LazyTrace(this._thunk);
+
+  Trace get _trace {
+    if (_inner == null) _inner = _thunk();
+    return _inner;
+  }
+
+  List<Frame> get frames => _trace.frames;
+  String get stackTrace => _trace.stackTrace;
+  String get fullStackTrace => _trace.fullStackTrace;
+  Trace get terse => new LazyTrace(() => _trace.terse);
+  Trace foldFrames(bool predicate(frame)) =>
+    new LazyTrace(() => _trace.foldFrames(predicate));
+  String toString() => _trace.toString();
+}
diff --git a/pkg/stack_trace/lib/src/trace.dart b/pkg/stack_trace/lib/src/trace.dart
index 54f99db..ffea498 100644
--- a/pkg/stack_trace/lib/src/trace.dart
+++ b/pkg/stack_trace/lib/src/trace.dart
@@ -9,6 +9,7 @@
 import 'dart:math' as math;
 
 import 'frame.dart';
+import 'lazy_trace.dart';
 
 final _patchRegExp = new RegExp(r"-patch$");
 
@@ -42,7 +43,7 @@
       throw '';
     } catch (_, nativeTrace) {
       var trace = new Trace.from(nativeTrace);
-      return new Trace(trace.frames.skip(level + 1));
+      return new LazyTrace(() => new Trace(trace.frames.skip(level + 1)));
     }
   }
 
@@ -52,7 +53,7 @@
   /// a [Trace], it will be returned as-is.
   factory Trace.from(StackTrace trace) {
     if (trace is Trace) return trace;
-    return new Trace.parse(trace.toString());
+    return new LazyTrace(() => new Trace.parse(trace.toString()));
   }
 
   /// Parses a string representation of a stack trace.
diff --git a/runtime/lib/errors_patch.dart b/runtime/lib/errors_patch.dart
index 7d763e3..daf8f01 100644
--- a/runtime/lib/errors_patch.dart
+++ b/runtime/lib/errors_patch.dart
@@ -23,7 +23,12 @@
     numPositionalArguments -= numNamedArguments;
     List positionalArguments;
     if (numPositionalArguments == 0) {
-      positionalArguments = [];
+      // Differ between no arguments specified and 0 arguments.
+      // TODO(srdjan): This can currently occur for unresolvable static methods.
+      // In that case, the arguments are evaluated but not passed to the
+      // throwing stub (see EffectGraphVisitor::BuildThrowNoSuchMethodError and
+      // Parser::ThrowNoSuchMethodError)).
+      positionalArguments = argumentNames == null ? null : [];
     } else {
       positionalArguments = arguments.sublist(0, numPositionalArguments);
     }
@@ -79,8 +84,13 @@
           msg = "The null object does not have a $type_str '$_memberName'"
               "$args_message.";
         } else {
-          msg = "Class '${_receiver.runtimeType}' has no instance $type_str "
-              "'$_memberName'$args_message.";
+          if (_receiver is Function) {
+            msg = "Closure call with mismatched arguments: "
+                "function '$_memberName'";
+          } else {
+            msg = "Class '${_receiver.runtimeType}' has no instance $type_str "
+                "'$_memberName'$args_message.";
+          }
         }
         break;
       }
@@ -94,7 +104,7 @@
         break;
       }
       case _InvocationMirror._TOP_LEVEL: {
-        msg = "No top-level $type_str '$_memberName' declared.";
+        msg = "No top-level $type_str '$_memberName'$args_message declared.";
         break;
       }
     }
@@ -104,7 +114,12 @@
   /* patch */ String toString() {
     StringBuffer actual_buf = new StringBuffer();
     int i = 0;
-    if (_arguments != null) {
+    if (_arguments == null) {
+      // Actual arguments unknown.
+      // TODO(srdjan): Remove once arguments are passed for unresolvable
+      // static methods.
+      actual_buf.write("...");
+    } else {
       for (; i < _arguments.length; i++) {
         if (i > 0) {
           actual_buf.write(", ");
diff --git a/runtime/lib/object.cc b/runtime/lib/object.cc
index 8bc8e4d..bebc1c6 100644
--- a/runtime/lib/object.cc
+++ b/runtime/lib/object.cc
@@ -40,13 +40,17 @@
   if (is_method.value()) {
     // Report if a function with same name (but different arguments) has been
     // found.
-    Class& instance_class = Class::Handle(instance.clazz());
-    Function& function =
-        Function::Handle(instance_class.LookupDynamicFunction(member_name));
-    while (function.IsNull()) {
-      instance_class = instance_class.SuperClass();
-      if (instance_class.IsNull()) break;
+    Function& function = Function::Handle();
+    if (instance.IsClosure()) {
+      function = Closure::function(instance);
+    } else {
+      Class& instance_class = Class::Handle(instance.clazz());
       function = instance_class.LookupDynamicFunction(member_name);
+      while (function.IsNull()) {
+        instance_class = instance_class.SuperClass();
+        if (instance_class.IsNull()) break;
+        function = instance_class.LookupDynamicFunction(member_name);
+      }
     }
     if (!function.IsNull()) {
       const int total_num_parameters = function.NumParameters();
diff --git a/runtime/vm/code_generator.cc b/runtime/vm/code_generator.cc
index 9df2cab..25ffdf1 100644
--- a/runtime/vm/code_generator.cc
+++ b/runtime/vm/code_generator.cc
@@ -1086,7 +1086,14 @@
   const Array& orig_arguments_desc = Array::CheckedHandle(arguments.ArgAt(2));
   const Array& orig_arguments = Array::CheckedHandle(arguments.ArgAt(3));
 
-  const String& original_function_name = String::Handle(ic_data.target_name());
+  String& original_function_name = String::Handle(ic_data.target_name());
+  if (receiver.IsClosure()) {
+    // For closure the function name is always 'call'. Replace it with the
+    // name of the closurized function so that exception contains more
+    // relevant information.
+    const Function& function = Function::Handle(Closure::function(receiver));
+    original_function_name = function.QualifiedUserVisibleName();
+  }
   const Object& result = Object::Handle(
       DartEntry::InvokeNoSuchMethod(receiver,
                                     original_function_name,
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 63f4ca4..dc2e042 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -449,8 +449,10 @@
     var_name = var_descriptors.GetName(i);
     RawLocalVarDescriptors::VarInfo var_info;
     var_descriptors.GetInfo(i, &var_info);
-    if (var_info.kind == RawLocalVarDescriptors::kContextChain) {
-      OS::Print("  saved CTX reg offset %"Pd"\n", var_info.index);
+    if (var_info.kind == RawLocalVarDescriptors::kSavedEntryContext) {
+      OS::Print("  saved caller's CTX reg offset %"Pd"\n", var_info.index);
+    } else if (var_info.kind == RawLocalVarDescriptors::kSavedCurrentContext) {
+      OS::Print("  saved current CTX reg offset %"Pd"\n", var_info.index);
     } else {
       if (var_info.kind == RawLocalVarDescriptors::kContextLevel) {
         OS::Print("  context level %"Pd" scope %d",
diff --git a/runtime/vm/dart_api_impl_test.cc b/runtime/vm/dart_api_impl_test.cc
index ae47a18..f79c008 100644
--- a/runtime/vm/dart_api_impl_test.cc
+++ b/runtime/vm/dart_api_impl_test.cc
@@ -5923,7 +5923,7 @@
   EXPECT_VALID(result);
 
   result = Dart_Invoke(test_script, NewString("e1"), 0, NULL);
-  EXPECT_ERROR(result, "method not found: 'unpatched'");
+  EXPECT_ERROR(result, "No top-level method 'unpatched'");
 
   int64_t value = 0;
   result = Dart_Invoke(test_script, NewString("m1"), 0, NULL);
diff --git a/runtime/vm/debugger.cc b/runtime/vm/debugger.cc
index 0023217..0692ef5 100644
--- a/runtime/vm/debugger.cc
+++ b/runtime/vm/debugger.cc
@@ -339,13 +339,15 @@
 }
 
 
-RawContext* ActivationFrame::GetSavedContext(const Context& ctx) {
+// Get the caller's context, or return ctx if the function does not
+// save the caller's context on entry.
+RawContext* ActivationFrame::GetSavedEntryContext(const Context& ctx) {
   GetVarDescriptors();
   intptr_t var_desc_len = var_descriptors_.Length();
   for (int i = 0; i < var_desc_len; i++) {
     RawLocalVarDescriptors::VarInfo var_info;
     var_descriptors_.GetInfo(i, &var_info);
-    if (var_info.kind == RawLocalVarDescriptors::kContextChain) {
+    if (var_info.kind == RawLocalVarDescriptors::kSavedEntryContext) {
       return reinterpret_cast<RawContext*>(GetLocalVarValue(var_info.index));
     }
   }
@@ -353,6 +355,22 @@
 }
 
 
+// Get the saved context if the callee of this activation frame is a
+// closure function.
+RawContext* ActivationFrame::GetSavedCurrentContext() {
+  GetVarDescriptors();
+  intptr_t var_desc_len = var_descriptors_.Length();
+  for (int i = 0; i < var_desc_len; i++) {
+    RawLocalVarDescriptors::VarInfo var_info;
+    var_descriptors_.GetInfo(i, &var_info);
+    if (var_info.kind == RawLocalVarDescriptors::kSavedCurrentContext) {
+      return reinterpret_cast<RawContext*>(GetLocalVarValue(var_info.index));
+    }
+  }
+  return Context::null();
+}
+
+
 ActivationFrame* DebuggerStackTrace::GetHandlerFrame(
     const Instance& exc_obj) const {
   ExceptionHandlers& handlers = ExceptionHandlers::Handle();
@@ -891,15 +909,40 @@
                                                         frame->fp(),
                                                         frame->sp(),
                                                         code);
+      // If this activation frame called a closure, the function has
+      // saved its context before the call.
+      if (stack_trace->Length() > 0) {
+        ActivationFrame* callee_frame =
+            stack_trace->ActivationFrameAt(stack_trace->Length() - 1);
+        if (callee_frame->function().IsClosureFunction()) {
+          ctx = activation->GetSavedCurrentContext();
+          if (FLAG_verbose_debug && ctx.IsNull()) {
+            const Function& caller = activation->function();
+            const Function& callee = callee_frame->function();
+            const Script& script =
+                Script::Handle(Class::Handle(caller.Owner()).script());
+            intptr_t line, col;
+            script.GetTokenLocation(activation->TokenPos(), &line, &col);
+            printf("CollectStackTrace error: no saved context in function "
+                "'%s' which calls closure '%s' "
+                " in line %"Pd" column %"Pd"\n",
+                caller.ToFullyQualifiedCString(),
+                callee.ToFullyQualifiedCString(),
+                line, col);
+          }
+          ASSERT(!ctx.IsNull());
+        }
+      }
       if (optimized_frame_found || code.is_optimized()) {
         // Set context to null, to avoid returning bad context variable values.
         activation->SetContext(Context::Handle());
         optimized_frame_found = true;
       } else {
         activation->SetContext(ctx);
-        ctx = activation->GetSavedContext(ctx);
       }
       stack_trace->AddActivation(activation);
+      // Get caller's context if this function saved it on entry.
+      ctx = activation->GetSavedEntryContext(ctx);
     } else if (frame->IsEntryFrame()) {
       ctx = reinterpret_cast<EntryFrame*>(frame)->SavedContext();
     }
@@ -1641,7 +1684,6 @@
 // Remove and delete the source breakpoint bpt and its associated
 // code breakpoints.
 void Debugger::RemoveBreakpoint(intptr_t bp_id) {
-  ASSERT(src_breakpoints_ != NULL);
   SourceBreakpoint* prev_bpt = NULL;
   SourceBreakpoint* curr_bpt = src_breakpoints_;
   while (curr_bpt != NULL) {
diff --git a/runtime/vm/debugger.h b/runtime/vm/debugger.h
index 94863b4..cef4502 100644
--- a/runtime/vm/debugger.h
+++ b/runtime/vm/debugger.h
@@ -159,7 +159,8 @@
                   Instance* value);
 
   RawArray* GetLocalVariables();
-  RawContext* GetSavedContext(const Context& ctx);
+  RawContext* GetSavedEntryContext(const Context& ctx);
+  RawContext* GetSavedCurrentContext();
 
  private:
   intptr_t PcDescIndex();
diff --git a/runtime/vm/flow_graph_builder.cc b/runtime/vm/flow_graph_builder.cc
index 9a7cf79..b4b833a 100644
--- a/runtime/vm/flow_graph_builder.cc
+++ b/runtime/vm/flow_graph_builder.cc
@@ -3240,6 +3240,7 @@
       Smi::ZoneHandle(Smi::New(invocation_type))));
   arguments->Add(PushArgument(invocation_type_value));
   // List arguments.
+  // TODO(regis): Pass arguments.
   Value* arguments_value = Bind(new ConstantInstr(Array::ZoneHandle()));
   arguments->Add(PushArgument(arguments_value));
   // List argumentNames.
diff --git a/runtime/vm/flow_graph_compiler_arm.cc b/runtime/vm/flow_graph_compiler_arm.cc
index acd4925..3f0078a 100644
--- a/runtime/vm/flow_graph_compiler_arm.cc
+++ b/runtime/vm/flow_graph_compiler_arm.cc
@@ -756,6 +756,8 @@
   // R5 : ic-data.
   // R4 : arguments descriptor array.
   __ BranchLink(&StubCode::CallNoSuchMethodFunctionLabel());
+  // Emit descriptors in order to provide correct postion in stacktrace.
+  AddCurrentDescriptor(PcDescriptors::kOther, -1, function.token_pos());
   if (is_optimizing()) {
     stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                       empty_stack_bitmap,
@@ -940,6 +942,8 @@
         // R5 : ic-data.
         // R4 : arguments descriptor array.
         __ BranchLink(&StubCode::CallNoSuchMethodFunctionLabel());
+        // Emit descriptors in order to provide correct postion in stacktrace.
+        AddCurrentDescriptor(PcDescriptors::kOther, -1, function.token_pos());
         if (is_optimizing()) {
           stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                             empty_stack_bitmap,
diff --git a/runtime/vm/flow_graph_compiler_ia32.cc b/runtime/vm/flow_graph_compiler_ia32.cc
index bc3d443..ac8423e 100644
--- a/runtime/vm/flow_graph_compiler_ia32.cc
+++ b/runtime/vm/flow_graph_compiler_ia32.cc
@@ -850,6 +850,8 @@
   // ECX : ic-data.
   // EDX : arguments descriptor array.
   __ call(&StubCode::CallNoSuchMethodFunctionLabel());
+  // Emit descriptors in order to provide correct postion in stacktrace.
+  AddCurrentDescriptor(PcDescriptors::kOther, -1, function.token_pos());
   if (is_optimizing()) {
     stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                       empty_stack_bitmap,
@@ -1009,6 +1011,8 @@
         // ECX : ic-data.
         // EDX : arguments descriptor array.
         __ call(&StubCode::CallNoSuchMethodFunctionLabel());
+        // Emit descriptors in order to provide correct postion in stacktrace.
+        AddCurrentDescriptor(PcDescriptors::kOther, -1, function.token_pos());
         if (is_optimizing()) {
           stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                             empty_stack_bitmap,
diff --git a/runtime/vm/flow_graph_compiler_mips.cc b/runtime/vm/flow_graph_compiler_mips.cc
index 4308491..2c286f1 100644
--- a/runtime/vm/flow_graph_compiler_mips.cc
+++ b/runtime/vm/flow_graph_compiler_mips.cc
@@ -774,6 +774,8 @@
   // S5 : ic-data.
   // S4 : arguments descriptor array.
   __ BranchLink(&StubCode::CallNoSuchMethodFunctionLabel());
+  // Emit descriptors in order to provide correct postion in stacktrace.
+  AddCurrentDescriptor(PcDescriptors::kOther, -1, function.token_pos());
   if (is_optimizing()) {
     stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                       empty_stack_bitmap,
@@ -984,6 +986,8 @@
         // S5 : ic-data.
         // S4 : arguments descriptor array.
         __ BranchLink(&StubCode::CallNoSuchMethodFunctionLabel());
+        // Emit descriptors in order to provide correct postion in stacktrace.
+        AddCurrentDescriptor(PcDescriptors::kOther, -1, function.token_pos());
         if (is_optimizing()) {
           stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                             empty_stack_bitmap,
diff --git a/runtime/vm/flow_graph_compiler_x64.cc b/runtime/vm/flow_graph_compiler_x64.cc
index d566fa1..ca8a7e0 100644
--- a/runtime/vm/flow_graph_compiler_x64.cc
+++ b/runtime/vm/flow_graph_compiler_x64.cc
@@ -848,6 +848,8 @@
   // RBX : ic-data.
   // R10 : arguments descriptor array.
   __ call(&StubCode::CallNoSuchMethodFunctionLabel());
+  // Emit descriptors in order to provide correct postion in stacktrace.
+  AddCurrentDescriptor(PcDescriptors::kOther, -1, function.token_pos());
   if (is_optimizing()) {
     stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                       empty_stack_bitmap,
@@ -1008,6 +1010,8 @@
         // RBX : ic-data.
         // R10 : arguments descriptor array.
         __ call(&StubCode::CallNoSuchMethodFunctionLabel());
+        // Emit descriptors in order to provide correct postion in stacktrace.
+        AddCurrentDescriptor(PcDescriptors::kOther, -1, function.token_pos());
         if (is_optimizing()) {
           stackmap_table_builder_->AddEntry(assembler()->CodeSize(),
                                             empty_stack_bitmap,
diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index 30a8cd0..a222421 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -12364,7 +12364,14 @@
 
 
 const char* Array::ToCString() const {
-  return "Array";
+  if (IsNull()) {
+    return "Array NULL";
+  }
+  const char* format = "Array len:%"Pd"";
+  intptr_t len = OS::SNPrint(NULL, 0, format, Length()) + 1;
+  char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
+  OS::SNPrint(chars, len, format, Length());
+  return chars;
 }
 
 
@@ -12429,7 +12436,14 @@
 
 
 const char* ImmutableArray::ToCString() const {
-  return "ImmutableArray";
+  if (IsNull()) {
+    return "ImmutableArray NULL";
+  }
+  const char* format = "ImmutableArray len:%"Pd"";
+  intptr_t len = OS::SNPrint(NULL, 0, format, Length()) + 1;
+  char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
+  OS::SNPrint(chars, len, format, Length());
+  return chars;
 }
 
 
@@ -12540,7 +12554,14 @@
 
 
 const char* GrowableObjectArray::ToCString() const {
-  return "GrowableObjectArray";
+  if (IsNull()) {
+    return "GrowableObjectArray NULL";
+  }
+  const char* format = "GrowableObjectArray len:%"Pd"";
+  intptr_t len = OS::SNPrint(NULL, 0, format, Length()) + 1;
+  char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
+  OS::SNPrint(chars, len, format, Length());
+  return chars;
 }
 
 
diff --git a/runtime/vm/object_test.cc b/runtime/vm/object_test.cc
index 854dd5e..56e8aeb 100644
--- a/runtime/vm/object_test.cc
+++ b/runtime/vm/object_test.cc
@@ -2341,6 +2341,7 @@
 #endif
   EXPECT((retval >> kSmiTagShift) == kSmiTestValue);
 }
+#endif  // ARCH_IS_64_BIT
 
 
 TEST_CASE(ExceptionHandlers) {
@@ -3203,6 +3204,4 @@
   EXPECT_EQ(test6.SourceFingerprint(), test7.SourceFingerprint());
 }
 
-#endif  // TARGET_ARCH_IA32 || TARGET_ARCH_X64 || TARGET_ARCH_ARM
-
 }  // namespace dart
diff --git a/runtime/vm/parser.cc b/runtime/vm/parser.cc
index d409f54..b7814db 100644
--- a/runtime/vm/parser.cc
+++ b/runtime/vm/parser.cc
@@ -6756,7 +6756,22 @@
   // List argumentNames.
   arguments->Add(new LiteralNode(call_pos, Array::ZoneHandle()));
   // List existingArgumentNames.
-  arguments->Add(new LiteralNode(call_pos, Array::ZoneHandle()));
+  // Check if there exists a function with the same name.
+  Function& function =
+     Function::Handle(cls.LookupStaticFunction(function_name));
+  if (function.IsNull()) {
+    // TODO(srdjan): Store argument values into the argument list.
+    arguments->Add(new LiteralNode(call_pos, Array::ZoneHandle()));
+  } else {
+    const int total_num_parameters = function.NumParameters();
+    Array& array = Array::ZoneHandle(Array::New(total_num_parameters));
+    array ^= array.Canonicalize();
+    // Skip receiver.
+    for (int i = 0; i < total_num_parameters; i++) {
+      array.SetAt(i, String::Handle(function.ParameterNameAt(i)));
+    }
+    arguments->Add(new LiteralNode(call_pos, array));
+  }
   return MakeStaticCall(Symbols::NoSuchMethodError(),
                         PrivateCoreLibName(Symbols::ThrowNew()),
                         arguments);
diff --git a/runtime/vm/raw_object.h b/runtime/vm/raw_object.h
index d7ed903..e4bf736 100644
--- a/runtime/vm/raw_object.h
+++ b/runtime/vm/raw_object.h
@@ -885,7 +885,8 @@
     kStackVar = 1,
     kContextVar,
     kContextLevel,
-    kContextChain
+    kSavedEntryContext,
+    kSavedCurrentContext
   };
 
   struct VarInfo {
diff --git a/runtime/vm/scopes.cc b/runtime/vm/scopes.cc
index 137f6b8..ebd35f6 100644
--- a/runtime/vm/scopes.cc
+++ b/runtime/vm/scopes.cc
@@ -258,13 +258,23 @@
         desc.info.end_pos = var->owner()->end_token_pos();
         desc.info.index = var->index();
         vars->Add(desc);
-      } else if (var->name().Equals(
-            Symbols::Name(Symbols::kSavedEntryContextVarId))) {
+      } else if (var->name().Equals(Symbols::SavedEntryContextVar())) {
         // This is the local variable in which the function saves the
         // caller's chain of closure contexts (caller's CTX register).
         VarDesc desc;
         desc.name = &var->name();
-        desc.info.kind = RawLocalVarDescriptors::kContextChain;
+        desc.info.kind = RawLocalVarDescriptors::kSavedEntryContext;
+        desc.info.scope_id = 0;
+        desc.info.begin_pos = 0;
+        desc.info.end_pos = 0;
+        desc.info.index = var->index();
+        vars->Add(desc);
+      } else if (var->name().Equals(Symbols::SavedCurrentContextVar())) {
+        // This is the local variable in which the function saves its
+        // own context before calling a closure function.
+        VarDesc desc;
+        desc.name = &var->name();
+        desc.info.kind = RawLocalVarDescriptors::kSavedCurrentContext;
         desc.info.scope_id = 0;
         desc.info.begin_pos = 0;
         desc.info.end_pos = 0;
diff --git a/sdk/lib/_internal/pub/lib/src/lock_file.dart b/sdk/lib/_internal/pub/lib/src/lock_file.dart
index 2f39161..1e85a4d 100644
--- a/sdk/lib/_internal/pub/lib/src/lock_file.dart
+++ b/sdk/lib/_internal/pub/lib/src/lock_file.dart
@@ -5,6 +5,7 @@
 library lock_file;
 
 import 'dart:json' as json;
+import 'dart:collection';
 
 import 'package:yaml/yaml.dart';
 
@@ -88,12 +89,16 @@
 
   /// Returns the serialized YAML text of the lock file.
   String serialize() {
-    var packagesObj = <String, Map>{};
-    packages.forEach((name, id) {
+    var packagesObj = new LinkedHashMap<String, Map>();
+
+    // Sort the packages by name.
+    var sortedKeys = packages.keys.toList();
+    sortedKeys.sort();
+    sortedKeys.forEach((name) {
       packagesObj[name] = {
-        'version': id.version.toString(),
-        'source': id.source.name,
-        'description': id.description
+        'version': packages[name].version.toString(),
+        'source': packages[name].source.name,
+        'description': packages[name].description
       };
     });
 
diff --git a/sdk/lib/_internal/pub/lib/src/solver/backtracking_solver.dart b/sdk/lib/_internal/pub/lib/src/solver/backtracking_solver.dart
index c5580a9..efb6fba 100644
--- a/sdk/lib/_internal/pub/lib/src/solver/backtracking_solver.dart
+++ b/sdk/lib/_internal/pub/lib/src/solver/backtracking_solver.dart
@@ -168,7 +168,7 @@
   /// version of it. If there are no more versions, continues to backtrack to
   /// previous selections, and so on. If there is nothing left to backtrack to,
   /// completes to the last failure that occurred.
-  Future<List<PackageId>> _traverseSolution() {
+  Future<List<PackageId>> _traverseSolution() => resetStack(() {
     return new Traverser(this).traverse().catchError((error) {
       if (error is! SolveFailure) throw error;
 
@@ -180,7 +180,7 @@
       // All out of solutions, so fail.
       throw error;
     });
-  }
+  });
 
   /// Backtracks from the current failed solution and determines the next
   /// solution to try. If possible, it will backjump based on the cause of the
@@ -192,29 +192,7 @@
     var dependers = failure.dependencies.map((dep) => dep.depender).toSet();
 
     while (!_selected.isEmpty) {
-      // Look for a relevant selection to jump back to.
-      for (var i = _selected.length - 1; i >= 0; i--) {
-        // Can't jump to a package that has no more alternatives.
-        if (_selected[i].length == 1) continue;
-
-        var selected = _selected[i].first;
-
-        // If we find the package itself that failed, jump to it.
-        if (selected.name == failure.package) {
-          logSolve('jump to selected package ${failure.package}');
-          _selected.removeRange(i + 1, _selected.length);
-          break;
-        }
-
-        // See if this package directly or indirectly depends on [package].
-        var path = _getDependencyPath(selected, failure.package);
-        if (path != null) {
-          logSolve('backjump to ${selected.name} because it depends on '
-                   '${failure.package}  by $path');
-          _selected.removeRange(i + 1, _selected.length);
-          break;
-        }
-      }
+      _backjump(failure);
 
       // Advance past the current version of the leaf-most package.
       var previous = _selected.last.removeFirst();
@@ -232,6 +210,44 @@
     return false;
   }
 
+  /// Walks the selected packages from most to least recent to determine which
+  /// ones can be ignored and jumped over by the backtracker. The only packages
+  /// we need to backtrack to are ones that have other versions to try and that
+  /// led (possibly indirectly) to the failure. Everything else can be skipped.
+  void _backjump(SolveFailure failure) {
+    for (var i = _selected.length - 1; i >= 0; i--) {
+      // Each queue will never be empty since it gets discarded by _backtrack()
+      // when that happens.
+      var selected = _selected[i].first;
+
+      // If the package has no more versions, we can jump over it.
+      if (_selected[i].length == 1) continue;
+
+      // If we get to the package that failed, backtrack to here.
+      if (selected.name == failure.package) {
+        logSolve('backjump to failed package ${selected.name}');
+        _selected.removeRange(i + 1, _selected.length);
+        return;
+      }
+
+      // If we get to a package that depends on the failing package, backtrack
+      // to here.
+      var path = _getDependencyPath(selected, failure.package);
+      if (path != null) {
+        logSolve('backjump to ${selected.name} because it depends on '
+                 '${failure.package} along $path');
+        _selected.removeRange(i + 1, _selected.length);
+        return;
+      }
+    }
+
+    // If we got here, we walked the entire list without finding a package that
+    // could lead to another solution, so discard everything. This will happen
+    // if every package that led to the failure has no other versions that it
+    // can try to select.
+    _selected.removeRange(1, _selected.length);
+  }
+
   /// Determines if [depender] has a direct or indirect dependency on
   /// [dependent] based on the currently selected versions of all packages.
   /// Returns a string describing the dependency chain if it does, or `null` if
@@ -407,9 +423,7 @@
     // Move onto the next package if we've traversed all of these references.
     if (deps.isEmpty) return _traversePackage();
 
-    // Pump the event loop to flatten the stack trace and workaround #9583.
-    // If that bug is fixed, this can be Future.sync() instead.
-    return new Future(() {
+    return resetStack(() {
       var dep = deps.removeFirst();
 
       _validateDependency(dep, depender);
@@ -594,7 +608,7 @@
 
   if (pubspec.environment.sdkVersion.allows(sdk.version)) return;
 
-  throw new CouldNotSolveException(
+  throw new BadSdkVersionException(pubspec.name,
       'Package ${pubspec.name} requires SDK version '
       '${pubspec.environment.sdkVersion} but the current SDK is '
       '${sdk.version}.');
diff --git a/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart b/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
index efd9e85..885acdc 100644
--- a/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
+++ b/sdk/lib/_internal/pub/lib/src/solver/version_solver.dart
@@ -218,13 +218,12 @@
       "depends on version ${dep.constraint}";
 }
 
-/// Exception thrown when the [VersionSolver] fails to find a solution after a
-/// certain number of iterations.
-class CouldNotSolveException extends SolveFailure {
-  CouldNotSolveException([String message])
-      : super(null, null),
-        _message = (message != null) ? message :
-            "Could not find a solution that met all constraints.";
+/// Exception thrown when the current SDK's version does not match a package's
+/// constraint on it.
+class BadSdkVersionException extends SolveFailure {
+  BadSdkVersionException(String package, String message)
+      : super(package, null),
+        _message = message;
 
   /// A message describing the specific kind of solve failure.
   final String _message;
diff --git a/sdk/lib/_internal/pub/lib/src/utils.dart b/sdk/lib/_internal/pub/lib/src/utils.dart
index c631381..a3f0f97 100644
--- a/sdk/lib/_internal/pub/lib/src/utils.dart
+++ b/sdk/lib/_internal/pub/lib/src/utils.dart
@@ -384,6 +384,31 @@
   }
 }
 
+/// Wraps [fn] to guard against several different kinds of stack overflow
+/// exceptions:
+///
+/// * A sufficiently long [Future] chain can cause a stack overflow if there are
+///   no asynchronous operations in it (issue 9583).
+/// * A recursive function that recurses too deeply without an asynchronous
+///   operation can cause a stack overflow.
+/// * Even if the former is guarded against by adding asynchronous operations,
+///   returning a value through the [Future] chain can still cause a stack
+///   overflow.
+Future resetStack(fn()) {
+  // Using a [Completer] breaks the [Future] chain for the return value and
+  // avoids the third case described above.
+  var completer = new Completer();
+
+  // Using [new Future] adds an asynchronous operation that works around the
+  // first and second cases described above.
+  new Future(fn).then((val) {
+    runAsync(() => completer.complete(val));
+  }).catchError((err) {
+    runAsync(() => completer.completeError(err));
+  });
+  return completer.future;
+}
+
 /// An exception class for exceptions that are intended to be seen by the user.
 /// These exceptions won't have any debugging information printed when they're
 /// thrown.
diff --git a/sdk/lib/_internal/pub/pub.status b/sdk/lib/_internal/pub/pub.status
index 93d4029..4e60ccb 100644
--- a/sdk/lib/_internal/pub/pub.status
+++ b/sdk/lib/_internal/pub/pub.status
@@ -14,5 +14,6 @@
 *: Skip
 
 [ $system == windows ]
+test/install/git/dependency_name_match_pubspec_test: Fail # Issue 10348
 test/io_test: Fail # Issue 7505
 test/install/hosted/fail_gracefully_on_url_resolve_test: Pass, Fail # Issue 9503
diff --git a/sdk/lib/_internal/pub/test/lock_file_test.dart b/sdk/lib/_internal/pub/test/lock_file_test.dart
index 95fcd71..0f7fe53 100644
--- a/sdk/lib/_internal/pub/test/lock_file_test.dart
+++ b/sdk/lib/_internal/pub/test/lock_file_test.dart
@@ -159,12 +159,16 @@
     });
 
     group('serialize()', () {
+      var lockfile;
+      setUp(() {
+        lockfile = new LockFile.empty();
+      });
+
       test('dumps the lockfile to YAML', () {
-        var lockfile = new LockFile.empty();
         lockfile.packages['foo'] = new PackageId(
             'foo', mockSource, new Version.parse('1.2.3'), 'foo desc');
         lockfile.packages['bar'] = new PackageId(
-            'foo', mockSource, new Version.parse('3.2.1'), 'bar desc');
+            'bar', mockSource, new Version.parse('3.2.1'), 'bar desc');
 
         expect(loadYaml(lockfile.serialize()), equals({
           'packages': {
@@ -181,6 +185,29 @@
           }
         }));
       });
+
+      test('lockfile is alphabetized by package name', () {
+        var testNames = ['baz', 'Qwe', 'Q', 'B', 'Bar', 'bar', 'foo'];
+        testNames.forEach((name) {
+          lockfile.packages[name] = new PackageId(name, mockSource,
+            new Version.parse('5.5.5'), '$name desc');
+        });
+
+        expect(lockfile.serialize(),
+          '# Generated by pub\n'
+          '# See http://pub.dartlang.org/doc/glossary.html#lockfile\n'
+          '\n'
+          '{"packages":{'
+          '"B":{"version":"5.5.5","source":"mock","description":"B desc"},'
+          '"Bar":{"version":"5.5.5","source":"mock","description":"Bar desc"},'
+          '"Q":{"version":"5.5.5","source":"mock","description":"Q desc"},'
+          '"Qwe":{"version":"5.5.5","source":"mock","description":"Qwe desc"},'
+          '"bar":{"version":"5.5.5","source":"mock","description":"bar desc"},'
+          '"baz":{"version":"5.5.5","source":"mock","description":"baz desc"},'
+          '"foo":{"version":"5.5.5","source":"mock","description":"foo desc"}}}'
+          '\n'
+        );
+      });
     });
   });
 }
diff --git a/sdk/lib/_internal/pub/test/test_pub.dart b/sdk/lib/_internal/pub/test/test_pub.dart
index b978d54..dbc326c 100644
--- a/sdk/lib/_internal/pub/test/test_pub.dart
+++ b/sdk/lib/_internal/pub/test/test_pub.dart
@@ -250,11 +250,6 @@
       currentSchedule.timeout = new Duration(seconds: 10);
     }
 
-    // By default, don't capture stack traces since they slow the tests way
-    // down. To debug failing tests, comment this out.
-    currentSchedule.captureStackTraces =
-        new Options().arguments.contains('--trace');
-
     // Ensure the SDK version is always available.
     d.dir(sdkPath, [
       d.file('version', '0.1.2.3')
diff --git a/sdk/lib/_internal/pub/test/version_solver_test.dart b/sdk/lib/_internal/pub/test/version_solver_test.dart
index 6c2cb22..35af3ac 100644
--- a/sdk/lib/_internal/pub/test/version_solver_test.dart
+++ b/sdk/lib/_internal/pub/test/version_solver_test.dart
@@ -10,6 +10,7 @@
 import 'package:unittest/unittest.dart';
 
 import '../lib/src/lock_file.dart';
+import '../lib/src/log.dart' as log;
 import '../lib/src/package.dart';
 import '../lib/src/pubspec.dart';
 import '../lib/src/sdk.dart' as sdk;
@@ -27,6 +28,9 @@
 main() {
   initConfig();
 
+  // Uncomment this to debug failing tests.
+  // log.showSolver();
+
   // Since this test isn't run from the SDK, it can't find the "version" file
   // to load. Instead, just manually inject a version.
   sdk.version = new Version(1, 2, 3);
@@ -484,6 +488,111 @@
     'c': '1.0.0'
   }, maxTries: 2);
 
+  // Tests that the backjumper will jump past unrelated selections when a
+  // source conflict occurs. This test selects, in order:
+  // - myapp -> a
+  // - myapp -> b
+  // - myapp -> c (1 of 5)
+  // - b -> a
+  // It selects a and b first because they have fewer versions than c. It
+  // traverses b's dependency on a after selecting a version of c because
+  // dependencies are traversed breadth-first (all of myapps's immediate deps
+  // before any other their deps).
+  //
+  // This means it doesn't discover the source conflict until after selecting
+  // c. When that happens, it should backjump past c instead of trying older
+  // versions of it since they aren't related to the conflict.
+  testResolve('backjump to conflicting source', {
+    'myapp 0.0.0': {
+      'a': 'any',
+      'b': 'any',
+      'c': 'any'
+    },
+    'a 1.0.0': {},
+    'a 1.0.0 from mock2': {},
+    'b 1.0.0': {
+      'a': 'any'
+    },
+    'b 2.0.0': {
+      'a from mock2': 'any'
+    },
+    'c 1.0.0': {},
+    'c 2.0.0': {},
+    'c 3.0.0': {},
+    'c 4.0.0': {},
+    'c 5.0.0': {},
+  }, result: {
+    'myapp from root': '0.0.0',
+    'a': '1.0.0',
+    'b': '1.0.0',
+    'c': '5.0.0'
+  }, maxTries: 2);
+
+  // Like the above test, but for a conflicting description.
+  testResolve('backjump to conflicting description', {
+    'myapp 0.0.0': {
+      'a-x': 'any',
+      'b': 'any',
+      'c': 'any'
+    },
+    'a-x 1.0.0': {},
+    'a-y 1.0.0': {},
+    'b 1.0.0': {
+      'a-x': 'any'
+    },
+    'b 2.0.0': {
+      'a-y': 'any'
+    },
+    'c 1.0.0': {},
+    'c 2.0.0': {},
+    'c 3.0.0': {},
+    'c 4.0.0': {},
+    'c 5.0.0': {},
+  }, result: {
+    'myapp from root': '0.0.0',
+    'a': '1.0.0',
+    'b': '1.0.0',
+    'c': '5.0.0'
+  }, maxTries: 2);
+
+  // Similar to the above two tests but where there is no solution. It should
+  // fail in this case with no backtracking.
+  testResolve('backjump to conflicting source', {
+    'myapp 0.0.0': {
+      'a': 'any',
+      'b': 'any',
+      'c': 'any'
+    },
+    'a 1.0.0': {},
+    'a 1.0.0 from mock2': {},
+    'b 1.0.0': {
+      'a from mock2': 'any'
+    },
+    'c 1.0.0': {},
+    'c 2.0.0': {},
+    'c 3.0.0': {},
+    'c 4.0.0': {},
+    'c 5.0.0': {},
+  }, error: sourceMismatch('myapp', 'b'), maxTries: 1);
+
+  testResolve('backjump to conflicting description', {
+    'myapp 0.0.0': {
+      'a-x': 'any',
+      'b': 'any',
+      'c': 'any'
+    },
+    'a-x 1.0.0': {},
+    'a-y 1.0.0': {},
+    'b 1.0.0': {
+      'a-y': 'any'
+    },
+    'c 1.0.0': {},
+    'c 2.0.0': {},
+    'c 3.0.0': {},
+    'c 4.0.0': {},
+    'c 5.0.0': {},
+  }, error: descriptionMismatch('myapp', 'b'), maxTries: 1);
+
   // Dependencies are ordered so that packages with fewer versions are tried
   // first. Here, there are two valid solutions (either a or b must be
   // downgraded once). The chosen one depends on which dep is traversed first.
@@ -619,13 +728,31 @@
   }, useBleedingEdgeSdkVersion: true);
 }
 
-testResolve(description, packages,
-            {lockfile, result, FailMatcherBuilder error, int maxTries,
+testResolve(description, packages, {
+             lockfile, result, FailMatcherBuilder error, int maxTries,
+             bool useBleedingEdgeSdkVersion}) {
+  _testResolve(test, description, packages, lockfile: lockfile, result: result,
+      error: error, maxTries: maxTries,
+      useBleedingEdgeSdkVersion: useBleedingEdgeSdkVersion);
+}
+
+solo_testResolve(description, packages, {
+             lockfile, result, FailMatcherBuilder error, int maxTries,
+             bool useBleedingEdgeSdkVersion}) {
+  log.showSolver();
+  _testResolve(solo_test, description, packages, lockfile: lockfile,
+      result: result, error: error, maxTries: maxTries,
+      useBleedingEdgeSdkVersion: useBleedingEdgeSdkVersion);
+}
+
+_testResolve(void testFn(String description, Function body),
+             description, packages, {
+             lockfile, result, FailMatcherBuilder error, int maxTries,
              bool useBleedingEdgeSdkVersion}) {
   if (maxTries == null) maxTries = 1;
   if (useBleedingEdgeSdkVersion == null) useBleedingEdgeSdkVersion = false;
 
-  test(description, () {
+  testFn(description, () {
     var cache = new SystemCache('.');
     source1 = new MockSource('mock1');
     source2 = new MockSource('mock2');
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index 39e95a4..d25e580 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -672,20 +672,12 @@
     return _slice_4();
   }
 
-  @DomName('Blob._slice_1')
-  @DocsEditable
   Blob _slice_1(start, end, contentType) native "Blob__slice_1_Callback";
 
-  @DomName('Blob._slice_2')
-  @DocsEditable
   Blob _slice_2(start, end) native "Blob__slice_2_Callback";
 
-  @DomName('Blob._slice_3')
-  @DocsEditable
   Blob _slice_3(start) native "Blob__slice_3_Callback";
 
-  @DomName('Blob._slice_4')
-  @DocsEditable
   Blob _slice_4() native "Blob__slice_4_Callback";
 
 }
@@ -1381,12 +1373,8 @@
     return;
   }
 
-  @DomName('CanvasRenderingContext2D._clip_1')
-  @DocsEditable
   void _clip_1(winding) native "CanvasRenderingContext2D__clip_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._clip_2')
-  @DocsEditable
   void _clip_2() native "CanvasRenderingContext2D__clip_2_Callback";
 
   @DomName('CanvasRenderingContext2D.closePath')
@@ -1415,12 +1403,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('CanvasRenderingContext2D._createPattern_1')
-  @DocsEditable
   CanvasPattern _createPattern_1(canvas_OR_image, repetitionType) native "CanvasRenderingContext2D__createPattern_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._createPattern_2')
-  @DocsEditable
   CanvasPattern _createPattern_2(canvas_OR_image, repetitionType) native "CanvasRenderingContext2D__createPattern_2_Callback";
 
   @DomName('CanvasRenderingContext2D.createRadialGradient')
@@ -1467,40 +1451,22 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('CanvasRenderingContext2D._drawImage_1')
-  @DocsEditable
   void _drawImage_1(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y) native "CanvasRenderingContext2D__drawImage_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._drawImage_2')
-  @DocsEditable
   void _drawImage_2(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y, sw_OR_width, height_OR_sh) native "CanvasRenderingContext2D__drawImage_2_Callback";
 
-  @DomName('CanvasRenderingContext2D._drawImage_3')
-  @DocsEditable
   void _drawImage_3(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y, sw_OR_width, height_OR_sh, dx, dy, dw, dh) native "CanvasRenderingContext2D__drawImage_3_Callback";
 
-  @DomName('CanvasRenderingContext2D._drawImage_4')
-  @DocsEditable
   void _drawImage_4(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y) native "CanvasRenderingContext2D__drawImage_4_Callback";
 
-  @DomName('CanvasRenderingContext2D._drawImage_5')
-  @DocsEditable
   void _drawImage_5(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y, sw_OR_width, height_OR_sh) native "CanvasRenderingContext2D__drawImage_5_Callback";
 
-  @DomName('CanvasRenderingContext2D._drawImage_6')
-  @DocsEditable
   void _drawImage_6(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y, sw_OR_width, height_OR_sh, dx, dy, dw, dh) native "CanvasRenderingContext2D__drawImage_6_Callback";
 
-  @DomName('CanvasRenderingContext2D._drawImage_7')
-  @DocsEditable
   void _drawImage_7(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y) native "CanvasRenderingContext2D__drawImage_7_Callback";
 
-  @DomName('CanvasRenderingContext2D._drawImage_8')
-  @DocsEditable
   void _drawImage_8(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y, sw_OR_width, height_OR_sh) native "CanvasRenderingContext2D__drawImage_8_Callback";
 
-  @DomName('CanvasRenderingContext2D._drawImage_9')
-  @DocsEditable
   void _drawImage_9(canvas_OR_image_OR_video, sx_OR_x, sy_OR_y, sw_OR_width, height_OR_sh, dx, dy, dw, dh) native "CanvasRenderingContext2D__drawImage_9_Callback";
 
   void fill([String winding]) {
@@ -1512,12 +1478,8 @@
     return;
   }
 
-  @DomName('CanvasRenderingContext2D._fill_1')
-  @DocsEditable
   void _fill_1(winding) native "CanvasRenderingContext2D__fill_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._fill_2')
-  @DocsEditable
   void _fill_2() native "CanvasRenderingContext2D__fill_2_Callback";
 
   @DomName('CanvasRenderingContext2D.fillRect')
@@ -1533,12 +1495,8 @@
     return;
   }
 
-  @DomName('CanvasRenderingContext2D._fillText_1')
-  @DocsEditable
   void _fillText_1(text, x, y, maxWidth) native "CanvasRenderingContext2D__fillText_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._fillText_2')
-  @DocsEditable
   void _fillText_2(text, x, y) native "CanvasRenderingContext2D__fillText_2_Callback";
 
   @DomName('CanvasRenderingContext2D.getImageData')
@@ -1556,12 +1514,8 @@
     return _isPointInPath_2(x, y);
   }
 
-  @DomName('CanvasRenderingContext2D._isPointInPath_1')
-  @DocsEditable
   bool _isPointInPath_1(x, y, winding) native "CanvasRenderingContext2D__isPointInPath_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._isPointInPath_2')
-  @DocsEditable
   bool _isPointInPath_2(x, y) native "CanvasRenderingContext2D__isPointInPath_2_Callback";
 
   @DomName('CanvasRenderingContext2D.isPointInStroke')
@@ -1592,12 +1546,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('CanvasRenderingContext2D._putImageData_1')
-  @DocsEditable
   void _putImageData_1(imagedata, dx, dy) native "CanvasRenderingContext2D__putImageData_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._putImageData_2')
-  @DocsEditable
   void _putImageData_2(imagedata, dx, dy, dirtyX, dirtyY, dirtyWidth, dirtyHeight) native "CanvasRenderingContext2D__putImageData_2_Callback";
 
   @DomName('CanvasRenderingContext2D.quadraticCurveTo')
@@ -1645,12 +1595,8 @@
     return;
   }
 
-  @DomName('CanvasRenderingContext2D._strokeRect_1')
-  @DocsEditable
   void _strokeRect_1(x, y, width, height, lineWidth) native "CanvasRenderingContext2D__strokeRect_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._strokeRect_2')
-  @DocsEditable
   void _strokeRect_2(x, y, width, height) native "CanvasRenderingContext2D__strokeRect_2_Callback";
 
   void strokeText(String text, num x, num y, [num maxWidth]) {
@@ -1662,12 +1608,8 @@
     return;
   }
 
-  @DomName('CanvasRenderingContext2D._strokeText_1')
-  @DocsEditable
   void _strokeText_1(text, x, y, maxWidth) native "CanvasRenderingContext2D__strokeText_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._strokeText_2')
-  @DocsEditable
   void _strokeText_2(text, x, y) native "CanvasRenderingContext2D__strokeText_2_Callback";
 
   @DomName('CanvasRenderingContext2D.transform')
@@ -1697,12 +1639,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('CanvasRenderingContext2D._webkitPutImageDataHD_1')
-  @DocsEditable
   void _webkitPutImageDataHD_1(imagedata, dx, dy) native "CanvasRenderingContext2D__webkitPutImageDataHD_1_Callback";
 
-  @DomName('CanvasRenderingContext2D._webkitPutImageDataHD_2')
-  @DocsEditable
   void _webkitPutImageDataHD_2(imagedata, dx, dy, dirtyX, dirtyY, dirtyWidth, dirtyHeight) native "CanvasRenderingContext2D__webkitPutImageDataHD_2_Callback";
 
 
@@ -5808,12 +5746,8 @@
     return _addRule_2(selector, style);
   }
 
-  @DomName('CSSStyleSheet._addRule_1')
-  @DocsEditable
   int _addRule_1(selector, style, index) native "CSSStyleSheet__addRule_1_Callback";
 
-  @DomName('CSSStyleSheet._addRule_2')
-  @DocsEditable
   int _addRule_2(selector, style) native "CSSStyleSheet__addRule_2_Callback";
 
   @DomName('CSSStyleSheet.deleteRule')
@@ -6072,12 +6006,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('DataTransferItemList._add_1')
-  @DocsEditable
   void _add_1(data_OR_file) native "DataTransferItemList__add_1_Callback";
 
-  @DomName('DataTransferItemList._add_2')
-  @DocsEditable
   void _add_2(data_OR_file, type) native "DataTransferItemList__add_2_Callback";
 
   @DomName('DataTransferItemList.clear')
@@ -6639,12 +6569,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('Document._createElement_1')
-  @DocsEditable
   Element _createElement_1(localName_OR_tagName) native "Document__createElement_1_Callback";
 
-  @DomName('Document._createElement_2')
-  @DocsEditable
   Element _createElement_2(localName_OR_tagName, typeExtension) native "Document__createElement_2_Callback";
 
   Element $dom_createElementNS(String namespaceURI, String qualifiedName, [String typeExtension]) {
@@ -6657,12 +6583,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('Document._createElementNS_1')
-  @DocsEditable
   Element _createElementNS_1(namespaceURI, qualifiedName) native "Document__createElementNS_1_Callback";
 
-  @DomName('Document._createElementNS_2')
-  @DocsEditable
   Element _createElementNS_2(namespaceURI, qualifiedName, typeExtension) native "Document__createElementNS_2_Callback";
 
   @DomName('Document.createEvent')
@@ -8336,12 +8258,8 @@
     return _toggle_2(token);
   }
 
-  @DomName('DOMTokenList._toggle_1')
-  @DocsEditable
   bool _toggle_1(token, force) native "DOMTokenList__toggle_1_Callback";
 
-  @DomName('DOMTokenList._toggle_2')
-  @DocsEditable
   bool _toggle_2(token) native "DOMTokenList__toggle_2_Callback";
 
 }
@@ -9287,12 +9205,8 @@
     return;
   }
 
-  @DomName('Element._scrollIntoView_1')
-  @DocsEditable
   void _scrollIntoView_1(alignWithTop) native "Element__scrollIntoView_1_Callback";
 
-  @DomName('Element._scrollIntoView_2')
-  @DocsEditable
   void _scrollIntoView_2() native "Element__scrollIntoView_2_Callback";
 
   void $dom_scrollIntoViewIfNeeded([bool centerIfNeeded]) {
@@ -9304,12 +9218,8 @@
     return;
   }
 
-  @DomName('Element._scrollIntoViewIfNeeded_1')
-  @DocsEditable
   void _scrollIntoViewIfNeeded_1(centerIfNeeded) native "Element__scrollIntoViewIfNeeded_1_Callback";
 
-  @DomName('Element._scrollIntoViewIfNeeded_2')
-  @DocsEditable
   void _scrollIntoViewIfNeeded_2() native "Element__scrollIntoViewIfNeeded_2_Callback";
 
   @DomName('Element.setAttribute')
@@ -9858,12 +9768,8 @@
     return;
   }
 
-  @DomName('Entry._copyTo_1')
-  @DocsEditable
   void _copyTo_1(parent, name, successCallback, errorCallback) native "Entry__copyTo_1_Callback";
 
-  @DomName('Entry._copyTo_2')
-  @DocsEditable
   void _copyTo_2(parent) native "Entry__copyTo_2_Callback";
 
   Future<Entry> copyTo(DirectoryEntry parent, {String name}) {
@@ -9907,12 +9813,8 @@
     return;
   }
 
-  @DomName('Entry._moveTo_1')
-  @DocsEditable
   void _moveTo_1(parent, name, successCallback, errorCallback) native "Entry__moveTo_1_Callback";
 
-  @DomName('Entry._moveTo_2')
-  @DocsEditable
   void _moveTo_2(parent) native "Entry__moveTo_2_Callback";
 
   Future<Entry> moveTo(DirectoryEntry parent, {String name}) {
@@ -10869,12 +10771,8 @@
     return;
   }
 
-  @DomName('FileReader._readAsText_1')
-  @DocsEditable
   void _readAsText_1(blob, encoding) native "FileReader__readAsText_1_Callback";
 
-  @DomName('FileReader._readAsText_2')
-  @DocsEditable
   void _readAsText_2(blob) native "FileReader__readAsText_2_Callback";
 
   @DomName('FileReader.removeEventListener')
@@ -13561,12 +13459,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('HTMLInputElement._setRangeText_1')
-  @DocsEditable
   void _setRangeText_1(replacement) native "HTMLInputElement__setRangeText_1_Callback";
 
-  @DomName('HTMLInputElement._setRangeText_2')
-  @DocsEditable
   void _setRangeText_2(replacement, start, end, selectionMode) native "HTMLInputElement__setRangeText_2_Callback";
 
   @DomName('HTMLInputElement.setSelectionRange')
@@ -13582,12 +13476,8 @@
     return;
   }
 
-  @DomName('HTMLInputElement._stepDown_1')
-  @DocsEditable
   void _stepDown_1(n) native "HTMLInputElement__stepDown_1_Callback";
 
-  @DomName('HTMLInputElement._stepDown_2')
-  @DocsEditable
   void _stepDown_2() native "HTMLInputElement__stepDown_2_Callback";
 
   void stepUp([int n]) {
@@ -13599,12 +13489,8 @@
     return;
   }
 
-  @DomName('HTMLInputElement._stepUp_1')
-  @DocsEditable
   void _stepUp_1(n) native "HTMLInputElement__stepUp_1_Callback";
 
-  @DomName('HTMLInputElement._stepUp_2')
-  @DocsEditable
   void _stepUp_2() native "HTMLInputElement__stepUp_2_Callback";
 
   @DomName('HTMLInputElement.onwebkitSpeechChange')
@@ -15113,16 +14999,10 @@
     return _addTextTrack_3(kind);
   }
 
-  @DomName('HTMLMediaElement._addTextTrack_1')
-  @DocsEditable
   TextTrack _addTextTrack_1(kind, label, language) native "HTMLMediaElement__addTextTrack_1_Callback";
 
-  @DomName('HTMLMediaElement._addTextTrack_2')
-  @DocsEditable
   TextTrack _addTextTrack_2(kind, label) native "HTMLMediaElement__addTextTrack_2_Callback";
 
-  @DomName('HTMLMediaElement._addTextTrack_3')
-  @DocsEditable
   TextTrack _addTextTrack_3(kind) native "HTMLMediaElement__addTextTrack_3_Callback";
 
   @DomName('HTMLMediaElement.canPlayType')
@@ -15150,12 +15030,8 @@
     return;
   }
 
-  @DomName('HTMLMediaElement._webkitAddKey_1')
-  @DocsEditable
   void _webkitAddKey_1(keySystem, key, initData, sessionId) native "HTMLMediaElement__webkitAddKey_1_Callback";
 
-  @DomName('HTMLMediaElement._webkitAddKey_2')
-  @DocsEditable
   void _webkitAddKey_2(keySystem, key) native "HTMLMediaElement__webkitAddKey_2_Callback";
 
   @DomName('HTMLMediaElement.webkitCancelKeyRequest')
@@ -15174,12 +15050,8 @@
     return;
   }
 
-  @DomName('HTMLMediaElement._webkitGenerateKeyRequest_1')
-  @DocsEditable
   void _webkitGenerateKeyRequest_1(keySystem, initData) native "HTMLMediaElement__webkitGenerateKeyRequest_1_Callback";
 
-  @DomName('HTMLMediaElement._webkitGenerateKeyRequest_2')
-  @DocsEditable
   void _webkitGenerateKeyRequest_2(keySystem) native "HTMLMediaElement__webkitGenerateKeyRequest_2_Callback";
 
   @DomName('HTMLMediaElement.oncanplay')
@@ -18957,20 +18829,12 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('RTCDataChannel._send_1')
-  @DocsEditable
   void _send_1(data) native "RTCDataChannel__send_1_Callback";
 
-  @DomName('RTCDataChannel._send_2')
-  @DocsEditable
   void _send_2(data) native "RTCDataChannel__send_2_Callback";
 
-  @DomName('RTCDataChannel._send_3')
-  @DocsEditable
   void _send_3(data) native "RTCDataChannel__send_3_Callback";
 
-  @DomName('RTCDataChannel._send_4')
-  @DocsEditable
   void _send_4(data) native "RTCDataChannel__send_4_Callback";
 
   @DomName('RTCDataChannel.onclose')
@@ -19064,16 +18928,10 @@
     return;
   }
 
-  @DomName('RTCDTMFSender._insertDTMF_1')
-  @DocsEditable
   void _insertDTMF_1(tones, duration, interToneGap) native "RTCDTMFSender__insertDTMF_1_Callback";
 
-  @DomName('RTCDTMFSender._insertDTMF_2')
-  @DocsEditable
   void _insertDTMF_2(tones, duration) native "RTCDTMFSender__insertDTMF_2_Callback";
 
-  @DomName('RTCDTMFSender._insertDTMF_3')
-  @DocsEditable
   void _insertDTMF_3(tones) native "RTCDTMFSender__insertDTMF_3_Callback";
 
   @DomName('RTCDTMFSender.removeEventListener')
@@ -20562,12 +20420,8 @@
     return;
   }
 
-  @DomName('SpeechGrammarList._addFromString_1')
-  @DocsEditable
   void _addFromString_1(string, weight) native "SpeechGrammarList__addFromString_1_Callback";
 
-  @DomName('SpeechGrammarList._addFromString_2')
-  @DocsEditable
   void _addFromString_2(string) native "SpeechGrammarList__addFromString_2_Callback";
 
   void addFromUri(String src, [num weight]) {
@@ -20579,12 +20433,8 @@
     return;
   }
 
-  @DomName('SpeechGrammarList._addFromUri_1')
-  @DocsEditable
   void _addFromUri_1(src, weight) native "SpeechGrammarList__addFromUri_1_Callback";
 
-  @DomName('SpeechGrammarList._addFromUri_2')
-  @DocsEditable
   void _addFromUri_2(src) native "SpeechGrammarList__addFromUri_2_Callback";
 
   @DomName('SpeechGrammarList.item')
@@ -21807,12 +21657,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('HTMLTextAreaElement._setRangeText_1')
-  @DocsEditable
   void _setRangeText_1(replacement) native "HTMLTextAreaElement__setRangeText_1_Callback";
 
-  @DomName('HTMLTextAreaElement._setRangeText_2')
-  @DocsEditable
   void _setRangeText_2(replacement, start, end, selectionMode) native "HTMLTextAreaElement__setRangeText_2_Callback";
 
   void setSelectionRange(int start, int end, [String direction]) {
@@ -21824,12 +21670,8 @@
     return;
   }
 
-  @DomName('HTMLTextAreaElement._setSelectionRange_1')
-  @DocsEditable
   void _setSelectionRange_1(start, end, direction) native "HTMLTextAreaElement__setSelectionRange_1_Callback";
 
-  @DomName('HTMLTextAreaElement._setSelectionRange_2')
-  @DocsEditable
   void _setSelectionRange_2(start, end) native "HTMLTextAreaElement__setSelectionRange_2_Callback";
 
 }
@@ -23317,16 +23159,10 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('DOMURL._createObjectURL_1')
-  @DocsEditable
   static String _createObjectURL_1(blob_OR_source_OR_stream) native "DOMURL__createObjectURL_1_Callback";
 
-  @DomName('DOMURL._createObjectURL_2')
-  @DocsEditable
   static String _createObjectURL_2(blob_OR_source_OR_stream) native "DOMURL__createObjectURL_2_Callback";
 
-  @DomName('DOMURL._createObjectURL_3')
-  @DocsEditable
   static String _createObjectURL_3(blob_OR_source_OR_stream) native "DOMURL__createObjectURL_3_Callback";
 
   @DomName('DOMURL.revokeObjectURL')
@@ -23681,16 +23517,10 @@
     return;
   }
 
-  @DomName('WebSocket._close_1')
-  @DocsEditable
   void _close_1(code, reason) native "WebSocket__close_1_Callback";
 
-  @DomName('WebSocket._close_2')
-  @DocsEditable
   void _close_2(code) native "WebSocket__close_2_Callback";
 
-  @DomName('WebSocket._close_3')
-  @DocsEditable
   void _close_3() native "WebSocket__close_3_Callback";
 
   @DomName('WebSocket.dispatchEvent')
diff --git a/sdk/lib/indexed_db/dartium/indexed_db_dartium.dart b/sdk/lib/indexed_db/dartium/indexed_db_dartium.dart
index 1285ca5..0d92e79 100644
--- a/sdk/lib/indexed_db/dartium/indexed_db_dartium.dart
+++ b/sdk/lib/indexed_db/dartium/indexed_db_dartium.dart
@@ -201,16 +201,10 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBDatabase._transaction_1')
-  @DocsEditable
   Transaction _transaction_1(storeName_OR_storeNames, mode) native "IDBDatabase__transaction_1_Callback";
 
-  @DomName('IDBDatabase._transaction_2')
-  @DocsEditable
   Transaction _transaction_2(storeName_OR_storeNames, mode) native "IDBDatabase__transaction_2_Callback";
 
-  @DomName('IDBDatabase._transaction_3')
-  @DocsEditable
   Transaction _transaction_3(storeName_OR_storeNames, mode) native "IDBDatabase__transaction_3_Callback";
 
   @DomName('IDBDatabase.onabort')
@@ -323,12 +317,8 @@
     return _open_2(name);
   }
 
-  @DomName('IDBFactory._open_1')
-  @DocsEditable
   OpenDBRequest _open_1(name, version) native "IDBFactory__open_1_Callback";
 
-  @DomName('IDBFactory._open_2')
-  @DocsEditable
   OpenDBRequest _open_2(name) native "IDBFactory__open_2_Callback";
 
   @DomName('IDBFactory.webkitGetDatabaseNames')
@@ -487,12 +477,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBIndex._count_1')
-  @DocsEditable
   Request _count_1(key_OR_range) native "IDBIndex__count_1_Callback";
 
-  @DomName('IDBIndex._count_2')
-  @DocsEditable
   Request _count_2(key_OR_range) native "IDBIndex__count_2_Callback";
 
   Request $dom_get(key) {
@@ -505,12 +491,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBIndex._get_1')
-  @DocsEditable
   Request _get_1(key) native "IDBIndex__get_1_Callback";
 
-  @DomName('IDBIndex._get_2')
-  @DocsEditable
   Request _get_2(key) native "IDBIndex__get_2_Callback";
 
   Request $dom_getKey(key) {
@@ -523,12 +505,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBIndex._getKey_1')
-  @DocsEditable
   Request _getKey_1(key) native "IDBIndex__getKey_1_Callback";
 
-  @DomName('IDBIndex._getKey_2')
-  @DocsEditable
   Request _getKey_2(key) native "IDBIndex__getKey_2_Callback";
 
   Request $dom_openCursor([key_OR_range, String direction]) {
@@ -541,12 +519,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBIndex._openCursor_1')
-  @DocsEditable
   Request _openCursor_1(key_OR_range, direction) native "IDBIndex__openCursor_1_Callback";
 
-  @DomName('IDBIndex._openCursor_2')
-  @DocsEditable
   Request _openCursor_2(key_OR_range, direction) native "IDBIndex__openCursor_2_Callback";
 
   Request $dom_openKeyCursor([key_OR_range, String direction]) {
@@ -559,12 +533,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBIndex._openKeyCursor_1')
-  @DocsEditable
   Request _openKeyCursor_1(key_OR_range, direction) native "IDBIndex__openKeyCursor_1_Callback";
 
-  @DomName('IDBIndex._openKeyCursor_2')
-  @DocsEditable
   Request _openKeyCursor_2(key_OR_range, direction) native "IDBIndex__openKeyCursor_2_Callback";
 
 }
@@ -807,12 +777,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBObjectStore._count_1')
-  @DocsEditable
   Request _count_1(key_OR_range) native "IDBObjectStore__count_1_Callback";
 
-  @DomName('IDBObjectStore._count_2')
-  @DocsEditable
   Request _count_2(key_OR_range) native "IDBObjectStore__count_2_Callback";
 
   Index $dom_createIndex(String name, keyPath, [Map options]) {
@@ -825,12 +791,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBObjectStore._createIndex_1')
-  @DocsEditable
   Index _createIndex_1(name, keyPath, options) native "IDBObjectStore__createIndex_1_Callback";
 
-  @DomName('IDBObjectStore._createIndex_2')
-  @DocsEditable
   Index _createIndex_2(name, keyPath, options) native "IDBObjectStore__createIndex_2_Callback";
 
   Request $dom_delete(key_OR_keyRange) {
@@ -843,12 +805,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBObjectStore._delete_1')
-  @DocsEditable
   Request _delete_1(key_OR_keyRange) native "IDBObjectStore__delete_1_Callback";
 
-  @DomName('IDBObjectStore._delete_2')
-  @DocsEditable
   Request _delete_2(key_OR_keyRange) native "IDBObjectStore__delete_2_Callback";
 
   @DomName('IDBObjectStore.deleteIndex')
@@ -865,12 +823,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBObjectStore._get_1')
-  @DocsEditable
   Request _get_1(key) native "IDBObjectStore__get_1_Callback";
 
-  @DomName('IDBObjectStore._get_2')
-  @DocsEditable
   Request _get_2(key) native "IDBObjectStore__get_2_Callback";
 
   @DomName('IDBObjectStore.index')
@@ -887,12 +841,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('IDBObjectStore._openCursor_1')
-  @DocsEditable
   Request _openCursor_1(key_OR_range, direction) native "IDBObjectStore__openCursor_1_Callback";
 
-  @DomName('IDBObjectStore._openCursor_2')
-  @DocsEditable
   Request _openCursor_2(key_OR_range, direction) native "IDBObjectStore__openCursor_2_Callback";
 
   @DomName('IDBObjectStore.put')
diff --git a/sdk/lib/web_audio/dartium/web_audio_dartium.dart b/sdk/lib/web_audio/dartium/web_audio_dartium.dart
index 0a06b2e..3c0dc87 100644
--- a/sdk/lib/web_audio/dartium/web_audio_dartium.dart
+++ b/sdk/lib/web_audio/dartium/web_audio_dartium.dart
@@ -203,16 +203,10 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('AudioBufferSourceNode._start_1')
-  @DocsEditable
   void _start_1(when) native "AudioBufferSourceNode__start_1_Callback";
 
-  @DomName('AudioBufferSourceNode._start_2')
-  @DocsEditable
   void _start_2(when, grainOffset) native "AudioBufferSourceNode__start_2_Callback";
 
-  @DomName('AudioBufferSourceNode._start_3')
-  @DocsEditable
   void _start_3(when, grainOffset, grainDuration) native "AudioBufferSourceNode__start_3_Callback";
 
   @DomName('AudioBufferSourceNode.stop')
@@ -278,12 +272,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('AudioContext._createBuffer_1')
-  @DocsEditable
   AudioBuffer _createBuffer_1(buffer_OR_numberOfChannels, mixToMono_OR_numberOfFrames, sampleRate) native "AudioContext__createBuffer_1_Callback";
 
-  @DomName('AudioContext._createBuffer_2')
-  @DocsEditable
   AudioBuffer _createBuffer_2(buffer_OR_numberOfChannels, mixToMono_OR_numberOfFrames) native "AudioContext__createBuffer_2_Callback";
 
   @DomName('AudioContext.createBufferSource')
@@ -297,12 +287,8 @@
     return _createChannelMerger_2();
   }
 
-  @DomName('AudioContext._createChannelMerger_1')
-  @DocsEditable
   ChannelMergerNode _createChannelMerger_1(numberOfInputs) native "AudioContext__createChannelMerger_1_Callback";
 
-  @DomName('AudioContext._createChannelMerger_2')
-  @DocsEditable
   ChannelMergerNode _createChannelMerger_2() native "AudioContext__createChannelMerger_2_Callback";
 
   ChannelSplitterNode createChannelSplitter([int numberOfOutputs]) {
@@ -312,12 +298,8 @@
     return _createChannelSplitter_2();
   }
 
-  @DomName('AudioContext._createChannelSplitter_1')
-  @DocsEditable
   ChannelSplitterNode _createChannelSplitter_1(numberOfOutputs) native "AudioContext__createChannelSplitter_1_Callback";
 
-  @DomName('AudioContext._createChannelSplitter_2')
-  @DocsEditable
   ChannelSplitterNode _createChannelSplitter_2() native "AudioContext__createChannelSplitter_2_Callback";
 
   @DomName('AudioContext.createConvolver')
@@ -331,12 +313,8 @@
     return _createDelay_2();
   }
 
-  @DomName('AudioContext._createDelay_1')
-  @DocsEditable
   DelayNode _createDelay_1(maxDelayTime) native "AudioContext__createDelay_1_Callback";
 
-  @DomName('AudioContext._createDelay_2')
-  @DocsEditable
   DelayNode _createDelay_2() native "AudioContext__createDelay_2_Callback";
 
   @DomName('AudioContext.createDynamicsCompressor')
@@ -377,16 +355,10 @@
     return _createScriptProcessor_3(bufferSize);
   }
 
-  @DomName('AudioContext._createScriptProcessor_1')
-  @DocsEditable
   ScriptProcessorNode _createScriptProcessor_1(bufferSize, numberOfInputChannels, numberOfOutputChannels) native "AudioContext__createScriptProcessor_1_Callback";
 
-  @DomName('AudioContext._createScriptProcessor_2')
-  @DocsEditable
   ScriptProcessorNode _createScriptProcessor_2(bufferSize, numberOfInputChannels) native "AudioContext__createScriptProcessor_2_Callback";
 
-  @DomName('AudioContext._createScriptProcessor_3')
-  @DocsEditable
   ScriptProcessorNode _createScriptProcessor_3(bufferSize) native "AudioContext__createScriptProcessor_3_Callback";
 
   @DomName('AudioContext.createWaveShaper')
@@ -528,12 +500,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('AudioNode._connect_1')
-  @DocsEditable
   void _connect_1(destination, output, input) native "AudioNode__connect_1_Callback";
 
-  @DomName('AudioNode._connect_2')
-  @DocsEditable
   void _connect_2(destination, output) native "AudioNode__connect_2_Callback";
 
   @DomName('AudioNode.disconnect')
diff --git a/sdk/lib/web_gl/dartium/web_gl_dartium.dart b/sdk/lib/web_gl/dartium/web_gl_dartium.dart
index e0a973c..72bf110 100644
--- a/sdk/lib/web_gl/dartium/web_gl_dartium.dart
+++ b/sdk/lib/web_gl/dartium/web_gl_dartium.dart
@@ -1466,16 +1466,10 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('WebGLRenderingContext._bufferData_1')
-  @DocsEditable
   void _bufferData_1(target, data_OR_size, usage) native "WebGLRenderingContext__bufferData_1_Callback";
 
-  @DomName('WebGLRenderingContext._bufferData_2')
-  @DocsEditable
   void _bufferData_2(target, data_OR_size, usage) native "WebGLRenderingContext__bufferData_2_Callback";
 
-  @DomName('WebGLRenderingContext._bufferData_3')
-  @DocsEditable
   void _bufferData_3(target, data_OR_size, usage) native "WebGLRenderingContext__bufferData_3_Callback";
 
   void bufferSubData(int target, int offset, data) {
@@ -1490,12 +1484,8 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('WebGLRenderingContext._bufferSubData_1')
-  @DocsEditable
   void _bufferSubData_1(target, offset, data) native "WebGLRenderingContext__bufferSubData_1_Callback";
 
-  @DomName('WebGLRenderingContext._bufferSubData_2')
-  @DocsEditable
   void _bufferSubData_2(target, offset, data) native "WebGLRenderingContext__bufferSubData_2_Callback";
 
   @DomName('WebGLRenderingContext.checkFramebufferStatus')
@@ -1874,24 +1864,14 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('WebGLRenderingContext._texImage2D_1')
-  @DocsEditable
   void _texImage2D_1(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video, format, type, pixels) native "WebGLRenderingContext__texImage2D_1_Callback";
 
-  @DomName('WebGLRenderingContext._texImage2D_2')
-  @DocsEditable
   void _texImage2D_2(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video) native "WebGLRenderingContext__texImage2D_2_Callback";
 
-  @DomName('WebGLRenderingContext._texImage2D_3')
-  @DocsEditable
   void _texImage2D_3(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video) native "WebGLRenderingContext__texImage2D_3_Callback";
 
-  @DomName('WebGLRenderingContext._texImage2D_4')
-  @DocsEditable
   void _texImage2D_4(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video) native "WebGLRenderingContext__texImage2D_4_Callback";
 
-  @DomName('WebGLRenderingContext._texImage2D_5')
-  @DocsEditable
   void _texImage2D_5(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video) native "WebGLRenderingContext__texImage2D_5_Callback";
 
   @DomName('WebGLRenderingContext.texParameterf')
@@ -1926,24 +1906,14 @@
     throw new ArgumentError("Incorrect number or type of arguments");
   }
 
-  @DomName('WebGLRenderingContext._texSubImage2D_1')
-  @DocsEditable
   void _texSubImage2D_1(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video, type, pixels) native "WebGLRenderingContext__texSubImage2D_1_Callback";
 
-  @DomName('WebGLRenderingContext._texSubImage2D_2')
-  @DocsEditable
   void _texSubImage2D_2(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video) native "WebGLRenderingContext__texSubImage2D_2_Callback";
 
-  @DomName('WebGLRenderingContext._texSubImage2D_3')
-  @DocsEditable
   void _texSubImage2D_3(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video) native "WebGLRenderingContext__texSubImage2D_3_Callback";
 
-  @DomName('WebGLRenderingContext._texSubImage2D_4')
-  @DocsEditable
   void _texSubImage2D_4(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video) native "WebGLRenderingContext__texSubImage2D_4_Callback";
 
-  @DomName('WebGLRenderingContext._texSubImage2D_5')
-  @DocsEditable
   void _texSubImage2D_5(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video) native "WebGLRenderingContext__texSubImage2D_5_Callback";
 
   @DomName('WebGLRenderingContext.uniform1f')
diff --git a/tools/VERSION b/tools/VERSION
index 870b65e..699b05f 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -1,4 +1,4 @@
 MAJOR 0
 MINOR 5
-BUILD 2
+BUILD 3
 PATCH 0
diff --git a/tools/ddbg.dart b/tools/ddbg.dart
index c81dd28..3b9dbbe 100644
--- a/tools/ddbg.dart
+++ b/tools/ddbg.dart
@@ -393,10 +393,10 @@
 
 void printStackFrame(frame_num, Map frame) {
   var fname = frame["functionName"];
-  var libId = frame["libraryId"];
+  var libId = frame["location"]["libraryId"];
   var url = frame["location"]["url"];
-  var line = frame["location"]["lineNumber"];
-  print("$frame_num  $fname ($url:$line) (lib $libId)");
+  var toff = frame["location"]["tokenOffset"];
+  print("$frame_num  $fname (url: $url token: $toff lib: $libId)");
   List locals = frame["locals"];
   for (int i = 0; i < locals.length; i++) {
     printNamedObject(locals[i]);
diff --git a/tools/dom/dom.json b/tools/dom/dom.json
new file mode 100644
index 0000000..c8d10bd
--- /dev/null
+++ b/tools/dom/dom.json
@@ -0,0 +1,11576 @@
+{
+  "AbstractWorker": {
+    "comment": "http://www.w3.org/TR/workers/#the-abstractworker-abstract-interface",
+    "members": {
+      "addEventListener": {},
+      "dispatchEvent": {},
+      "onerror": {},
+      "removeEventListener": {}
+    },
+    "support_level": "stable"
+  },
+  "AnalyserNode": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AnalyserNode",
+    "members": {
+      "fftSize": {},
+      "frequencyBinCount": {},
+      "getByteFrequencyData": {},
+      "getByteTimeDomainData": {},
+      "getFloatFrequencyData": {},
+      "maxDecibels": {},
+      "minDecibels": {},
+      "smoothingTimeConstant": {}
+    },
+    "support_level": "experimental"
+  },
+  "AnimationEvent": {
+    "comment": "http://www.w3.org/TR/css3-animations/#AnimationEvent-interface",
+    "members": {
+      "animationName": {},
+      "elapsedTime": {}
+    },
+    "support_level": "stable"
+  },
+  "ArrayBuffer": {
+    "comment": "http://www.khronos.org/registry/typedarray/specs/latest/",
+    "members": {
+      "byteLength": {},
+      "slice": {}
+    },
+    "support_level": "stable"
+  },
+  "ArrayBufferView": {
+    "comment": "http://www.khronos.org/registry/typedarray/specs/latest/",
+    "members": {
+      "buffer": {},
+      "byteLength": {},
+      "byteOffset": {}
+    },
+    "support_level": "stable"
+  },
+  "Attr": {
+    "comment": "http://www.w3.org/TR/dom/#interface-attr",
+    "members": {
+      "isId": {},
+      "name": {},
+      "ownerElement": {
+        "dart_action": "suppress",
+        "support_level": "deprecated"
+      },
+      "specified": {
+        "dart_action": "suppress",
+        "support_level": "deprecated"
+      },
+      "value": {}
+    },
+    "support_level": "stable"
+  },
+  "AudioBuffer": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioBuffer-section",
+    "dart_action": "default",
+    "members": {
+      "duration": {},
+      "gain": {},
+      "getChannelData": {},
+      "length": {},
+      "numberOfChannels": {},
+      "sampleRate": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioBufferCallback": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioBuffer-section",
+    "members": {
+      "handleEvent": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioBufferSourceNode": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioBufferSourceNode-section",
+    "members": {
+      "FINISHED_STATE": {},
+      "PLAYING_STATE": {},
+      "SCHEDULED_STATE": {},
+      "UNSCHEDULED_STATE": {},
+      "buffer": {},
+      "gain": {},
+      "loop": {},
+      "loopEnd": {},
+      "loopStart": {},
+      "playbackRate": {},
+      "playbackState": {},
+      "start": {},
+      "stop": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioContext": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioContext-section",
+    "members": {
+      "activeSourceCount": {},
+      "createAnalyser": {},
+      "createBiquadFilter": {},
+      "createBuffer": {},
+      "createBufferSource": {},
+      "createChannelMerger": {},
+      "createChannelSplitter": {},
+      "createConvolver": {},
+      "createDelay": {},
+      "createDynamicsCompressor": {},
+      "createGain": {},
+      "createMediaElementSource": {},
+      "createMediaStreamDestination": {},
+      "createMediaStreamSource": {},
+      "createOscillator": {},
+      "createPanner": {},
+      "createScriptProcessor": {},
+      "createWaveShaper": {},
+      "createWaveTable": {},
+      "currentTime": {},
+      "decodeAudioData": {},
+      "destination": {},
+      "listener": {},
+      "oncomplete": {},
+      "sampleRate": {},
+      "startRendering": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioDestinationNode": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioDestinationNode-section",
+    "members": {
+      "maxChannelCount": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioListener": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioListener-section",
+    "members": {
+      "dopplerFactor": {},
+      "setOrientation": {},
+      "setPosition": {},
+      "setVelocity": {},
+      "speedOfSound": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioNode": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioNode-section",
+    "members": {
+      "channelCount": {},
+      "channelCountMode": {},
+      "channelInterpretation": {},
+      "connect": {},
+      "context": {},
+      "disconnect": {},
+      "numberOfInputs": {},
+      "numberOfOutputs": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioParam": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioParam",
+    "members": {
+      "cancelScheduledValues": {},
+      "defaultValue": {},
+      "exponentialRampToValueAtTime": {},
+      "linearRampToValueAtTime": {},
+      "maxValue": {},
+      "minValue": {},
+      "name": {},
+      "setTargetAtTime": {},
+      "setValueAtTime": {},
+      "setValueCurveAtTime": {},
+      "units": {},
+      "value": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioProcessingEvent": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioProcessingEvent-section",
+    "members": {
+      "inputBuffer": {},
+      "outputBuffer": {}
+    },
+    "support_level": "experimental"
+  },
+  "AudioSourceNode": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html",
+    "members": {},
+    "support_level": "experimental"
+  },
+  "AutocompleteErrorEvent": {
+    "comment": "http://wiki.whatwg.org/wiki/RequestAutocomplete",
+    "members": {
+      "reason": {}
+    },
+    "support_level": "experimental"
+  },
+  "BarInfo": {
+    "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/browsers.html#barprop (Rename to BarProp?)",
+    "members": {
+      "visible": {}
+    },
+    "support_level": "nonstandard"
+  },
+  "BatteryManager": {
+    "comment": "https://dvcs.w3.org/hg/dap/raw-file/default/battery/Overview.html#batterymanager-interface",
+    "dart_action": "experimental",
+    "members": {
+      "addEventListener": {},
+      "charging": {},
+      "chargingTime": {},
+      "dischargingTime": {},
+      "dispatchEvent": {},
+      "level": {},
+      "onchargingchange": {},
+      "onchargingtimechange": {},
+      "ondischargingtimechange": {},
+      "onlevelchange": {},
+      "removeEventListener": {}
+    },
+    "support_level": "stable"
+  },
+  "BeforeLoadEvent": {
+    "members": {
+      "url": {}
+    },
+    "support_level": "experimental"
+  },
+  "BiquadFilterNode": {
+    "comment": "https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#BiquadFilterNode-section",
+    "members": {
+      "ALLPASS": {},
+      "BANDPASS": {},
+      "HIGHPASS": {},
+      "HIGHSHELF": {},
+      "LOWPASS": {},
+      "LOWSHELF": {},
+      "NOTCH": {},
+      "PEAKING": {},
+      "Q": {},
+      "detune": {},
+      "frequency": {},
+      "gain": {},
+      "getFrequencyResponse": {},
+      "type": {}
+    },
+    "support_level": "experimental"
+  },
+  "Blob": {
+    "comment": "http://www.w3.org/TR/FileAPI/#dfn-Blob",
+    "members": {
+      "size": {},
+      "slice": {},
+      "type": {}
+    },
+    "support_level": "stable"
+  },
+  "CDATASection": {
+    "comment": "http://dom.spec.whatwg.org/#cdatasection",
+    "dart_action": "suppress",
+    "members": {},
+    "support_level": "deprecated"
+  },
+  "CSSCharsetRule": {
+    "comment": "http://dev.w3.org/csswg/cssom/#the-csscharsetrule-interface",
+    "dart_action": "default",
+    "members": {
+      "encoding": {}
+    },
+    "support_level": "experimental"
+  },
+  "CSSFontFaceLoadEvent": {
+    "comment": "http://www.w3.org/TR/css3-fonts/",
+    "members": {
+      "error": {},
+      "fontface": {}
+    },
+    "support_level": "experimental"
+  },
+  "CSSFontFaceRule": {
+    "comment": "http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSFontFaceRule",
+    "members": {
+      "style": {}
+    },
+    "support_level": "stable"
+  },
+  "CSSHostRule": {
+    "comment": "https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#css-host-rule-interface",
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+        "support_level": "experimental"
+      },
+      "webkitResolveLocalFileSystemSyncURL": {
+        "comment": "http://www.w3.org/TR/file-system-api/#idl-def-LocalFileSystemSync",
+        "support_level": "experimental"
+      },
+      "webkitResolveLocalFileSystemURL": {
+        "comment": "http://www.w3.org/TR/file-system-api/#idl-def-LocalFileSystem",
+        "support_level": "experimental"
+      }
+    },
+    "support_level": "stable"
+  },
+  "WorkerLocation": {
+    "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#workerlocation",
+    "dart_action": "default",
+    "members": {
+      "hash": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      },
+      "host": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      },
+      "hostname": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      },
+      "href": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      },
+      "pathname": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      },
+      "port": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      },
+      "protocol": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      },
+      "search": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      },
+      "toString": {
+        "comment": "http://url.spec.whatwg.org/#urlutils"
+      }
+    },
+    "support_level": "experimental"
+  },
+  "WorkerNavigator": {
+    "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#workernavigator",
+    "members": {
+      "appName": {
+        "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#navigatorid"
+      },
+      "appVersion": {
+        "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#navigatorid"
+      },
+      "onLine": {
+        "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/offline.html#navigatoronline"
+      },
+      "platform": {
+        "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#navigatorid"
+      },
+      "userAgent": {
+        "comment": "http://www.whatwg.org/specs/web-apps/current-work/multipage/timers.html#navigatorid"
+      },
+      "webkitPersistentStorage": {
+        "comment": "http://www.w3.org/TR/quota-api/#accessing-storagequota",
+        "support_level": "experimental"
+      },
+      "webkitTemporaryStorage": {
+        "support_level": "experimental"
+      }
+    },
+    "support_level": "experimental"
+  },
+  "XMLHttpRequest": {
+    "comment": "http://xhr.spec.whatwg.org/#interface-xmlhttprequest",
+    "members": {
+      "DONE": {},
+      "HEADERS_RECEIVED": {},
+      "LOADING": {},
+      "OPENED": {},
+      "UNSENT": {},
+      "XMLHttpRequest": {},
+      "abort": {},
+      "addEventListener": {},
+      "dispatchEvent": {},
+      "getAllResponseHeaders": {
+        "dart_action": "unstable"
+      },
+      "getResponseHeader": {
+        "dart_action": "unstable"
+      },
+      "onabort": {},
+      "onerror": {},
+      "onload": {},
+      "onloadend": {},
+      "onloadstart": {},
+      "onprogress": {},
+      "onreadystatechange": {},
+      "open": {},
+      "overrideMimeType": {},
+      "readyState": {},
+      "removeEventListener": {},
+      "response": {},
+      "responseText": {},
+      "responseType": {},
+      "responseXML": {},
+      "send": {},
+      "setRequestHeader": {},
+      "status": {},
+      "statusText": {},
+      "upload": {
+        "dart_action": "unstable"
+      },
+      "withCredentials": {}
+    },
+    "support_level": "stable"
+  },
+  "XMLHttpRequestException": {
+    "comment": "http://www.w3.org/TR/2007/WD-XMLHttpRequest-20070227/#exceptions",
+    "dart_action": "experimental",
+    "members": {
+      "ABORT_ERR": {
+        "support_level": "nonstandard"
+      },
+      "NETWORK_ERR": {},
+      "code": {},
+      "message": {
+        "support_level": "nonstandard"
+      },
+      "name": {
+        "support_level": "nonstandard"
+      },
+      "toString": {}
+    },
+    "support_level": "nonstandard"
+  },
+  "XMLHttpRequestProgressEvent": {
+    "dart_action": "experimental",
+    "members": {
+      "position": {},
+      "totalSize": {}
+    },
+    "support_level": "nonstandard"
+  },
+  "XMLHttpRequestUpload": {
+    "comment": "http://xhr.spec.whatwg.org/#xmlhttprequestupload",
+    "members": {
+      "addEventListener": {},
+      "dispatchEvent": {},
+      "onabort": {},
+      "onerror": {},
+      "onload": {},
+      "onloadend": {},
+      "onloadstart": {},
+      "onprogress": {},
+      "removeEventListener": {}
+    },
+    "support_level": "experimental"
+  },
+  "XMLSerializer": {
+    "comment": "http://domparsing.spec.whatwg.org/#the-xmlserializer-interface",
+    "dart_action": "suppress",
+    "members": {
+      "XMLSerializer": {},
+      "serializeToString": {}
+    },
+    "support_level": "stable"
+  },
+  "XPathEvaluator": {
+    "comment": "http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathEvaluator",
+    "dart_action": "suppress",
+    "members": {
+      "XPathEvaluator": {},
+      "createExpression": {},
+      "createNSResolver": {},
+      "evaluate": {}
+    },
+    "support_level": "experimental"
+  },
+  "XPathException": {
+    "comment": "http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathException",
+    "dart_action": "suppress",
+    "members": {
+      "INVALID_EXPRESSION_ERR": {},
+      "TYPE_ERR": {},
+      "code": {},
+      "message": {
+        "support_level": "nonstandard"
+      },
+      "name": {
+        "support_level": "nonstandard"
+      },
+      "toString": {}
+    },
+    "support_level": "experimental"
+  },
+  "XPathExpression": {
+    "comment": "http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathExpression",
+    "dart_action": "suppress",
+    "members": {
+      "evaluate": {}
+    },
+    "support_level": "experimental"
+  },
+  "XPathNSResolver": {
+    "comment": "http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathNSResolver",
+    "dart_action": "suppress",
+    "members": {
+      "lookupNamespaceURI": {}
+    },
+    "support_level": "experimental"
+  },
+  "XPathResult": {
+    "comment": "http://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathResult",
+    "dart_action": "suppress",
+    "members": {
+      "ANY_TYPE": {},
+      "ANY_UNORDERED_NODE_TYPE": {},
+      "BOOLEAN_TYPE": {},
+      "FIRST_ORDERED_NODE_TYPE": {},
+      "NUMBER_TYPE": {},
+      "ORDERED_NODE_ITERATOR_TYPE": {},
+      "ORDERED_NODE_SNAPSHOT_TYPE": {},
+      "STRING_TYPE": {},
+      "UNORDERED_NODE_ITERATOR_TYPE": {},
+      "UNORDERED_NODE_SNAPSHOT_TYPE": {},
+      "booleanValue": {},
+      "invalidIteratorState": {},
+      "iterateNext": {},
+      "numberValue": {},
+      "resultType": {},
+      "singleNodeValue": {},
+      "snapshotItem": {},
+      "snapshotLength": {},
+      "stringValue": {}
+    },
+    "support_level": "experimental"
+  },
+  "XSLTProcessor": {
+    "dart_action": "suppress",
+    "members": {
+      "XSLTProcessor": {},
+      "clearParameters": {},
+      "getParameter": {},
+      "importStylesheet": {},
+      "removeParameter": {},
+      "reset": {},
+      "setParameter": {},
+      "transformToDocument": {},
+      "transformToFragment": {}
+    },
+    "support_level": "nonstandard"
+  }
+}
\ No newline at end of file
diff --git a/tools/dom/scripts/dartdomgenerator.py b/tools/dom/scripts/dartdomgenerator.py
index 914b7ca..1292920 100755
--- a/tools/dom/scripts/dartdomgenerator.py
+++ b/tools/dom/scripts/dartdomgenerator.py
@@ -16,6 +16,7 @@
 import shutil
 import subprocess
 import sys
+from dartmetadata import DartMetadata
 from generator import TypeRegistry
 from htmleventgenerator import HtmlEventGenerator
 from htmlrenamer import HtmlRenamer
@@ -31,11 +32,13 @@
 _logger = logging.getLogger('dartdomgenerator')
 
 class GeneratorOptions(object):
-  def __init__(self, templates, database, type_registry, renamer):
+  def __init__(self, templates, database, type_registry, renamer,
+      metadata):
     self.templates = templates
     self.database = database
     self.type_registry = type_registry
     self.renamer = renamer
+    self.metadata = metadata;
 
 def LoadDatabase(database_dir, use_database_cache):
   common_database = database.Database(database_dir)
@@ -68,14 +71,18 @@
   emitters = multiemitter.MultiEmitter()
   renamer = HtmlRenamer(webkit_database)
   type_registry = TypeRegistry(webkit_database, renamer)
+  metadata = DartMetadata(
+      os.path.join(current_dir, '..', 'dom.json'),
+      os.path.join(current_dir, '..', 'docs', 'docs.json'))
 
   def RunGenerator(dart_libraries, dart_output_dir,
                    template_loader, backend_factory):
     options = GeneratorOptions(
-        template_loader, webkit_database, type_registry, renamer)
+        template_loader, webkit_database, type_registry, renamer,
+        metadata)
     dart_library_emitter = DartLibraryEmitter(
         emitters, dart_output_dir, dart_libraries)
-    event_generator = HtmlEventGenerator(webkit_database, renamer,
+    event_generator = HtmlEventGenerator(webkit_database, renamer, metadata,
         template_loader)
 
     def generate_interface(interface):
@@ -94,7 +101,8 @@
                                      template_paths,
                                      {'DARTIUM': False, 'DART2JS': True})
     backend_options = GeneratorOptions(
-        template_loader, webkit_database, type_registry, renamer)
+        template_loader, webkit_database, type_registry, renamer,
+        metadata)
     backend_factory = lambda interface:\
         Dart2JSBackend(interface, backend_options)
 
@@ -111,7 +119,8 @@
                                      template_paths,
                                      {'DARTIUM': True, 'DART2JS': False})
     backend_options = GeneratorOptions(
-        template_loader, webkit_database, type_registry, renamer)
+        template_loader, webkit_database, type_registry, renamer,
+        metadata)
     cpp_output_dir = os.path.join(dartium_output_dir, 'cpp')
     cpp_library_emitter = CPPLibraryEmitter(emitters, cpp_output_dir)
     backend_factory = lambda interface:\
@@ -131,6 +140,7 @@
 
   _logger.info('Flush...')
   emitters.Flush()
+  metadata.Flush()
 
   monitored.FinishMonitoring(dart2js_output_dir)
 
diff --git a/tools/dom/scripts/dartmetadata.py b/tools/dom/scripts/dartmetadata.py
new file mode 100644
index 0000000..ddb441c
--- /dev/null
+++ b/tools/dom/scripts/dartmetadata.py
@@ -0,0 +1,568 @@
+#!/usr/bin/python
+# Copyright (c) 2012, 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.
+
+"""This module provides shared functionality to provide Dart metadata for
+DOM APIs.
+"""
+
+import copy
+import json
+import logging
+import monitored
+import os
+import re
+from generator import ConstantOutputOrder
+from htmlrenamer import renamed_html_members
+
+_logger = logging.getLogger('DartMetadata')
+
+# Annotations to be placed on native members.  The table is indexed by the IDL
+# interface and member name, and by IDL return or field type name.  Both are
+# used to assemble the annotations:
+#
+#   INTERFACE.MEMBER: annotations for member.
+#   +TYPE:            add annotations only if there are member annotations.
+#   -TYPE:            add annotations only if there are no member annotations.
+#   TYPE:             add regardless of member annotations.
+
+_dart2js_annotations = monitored.Dict('dartmetadata._dart2js_annotations', {
+
+    'ArrayBufferView': [
+      "@Creates('TypedData')",
+      "@Returns('TypedData|Null')",
+    ],
+
+    'CanvasRenderingContext2D.createImageData': [
+      "@Creates('ImageData|=Object')",
+    ],
+
+    'CanvasRenderingContext2D.getImageData': [
+      "@Creates('ImageData|=Object')",
+    ],
+
+    'CanvasRenderingContext2D.webkitGetImageDataHD': [
+      "@Creates('ImageData|=Object')",
+    ],
+
+    'CanvasRenderingContext2D.fillStyle': [
+      "@Creates('String|CanvasGradient|CanvasPattern')",
+      "@Returns('String|CanvasGradient|CanvasPattern')",
+    ],
+
+    'CanvasRenderingContext2D.strokeStyle': [
+      "@Creates('String|CanvasGradient|CanvasPattern')",
+      "@Returns('String|CanvasGradient|CanvasPattern')",
+    ],
+
+    # Methods returning Window can return a local window, or a cross-frame
+    # window (=Object) that needs wrapping.
+    'DOMWindow': [
+      "@Creates('Window|=Object')",
+      "@Returns('Window|=Object')",
+    ],
+
+    'DOMWindow.openDatabase': [
+      "@Creates('SqlDatabase')",
+    ],
+
+    # To be in callback with the browser-created Event, we had to have called
+    # addEventListener on the target, so we avoid
+    'Event.currentTarget': [
+      "@Creates('Null')",
+      "@Returns('EventTarget|=Object')",
+    ],
+
+    # Only nodes in the DOM bubble and have target !== currentTarget.
+    'Event.target': [
+      "@Creates('Node')",
+      "@Returns('EventTarget|=Object')",
+    ],
+
+    'MouseEvent.relatedTarget': [
+      "@Creates('Node')",
+      "@Returns('EventTarget|=Object')",
+    ],
+
+    # Touch targets are Elements in a Document, or the Document.
+    'Touch.target': [
+      "@Creates('Element|Document')",
+      "@Returns('Element|Document')",
+    ],
+
+    'FileReader.result': ["@Creates('String|ByteBuffer|Null')"],
+
+    # Rather than have the result of an IDBRequest as a union over all possible
+    # results, we mark the result as instantiating any classes, and mark
+    # each operation with the classes that it could cause to be asynchronously
+    # instantiated.
+    'IDBRequest.result': ["@Creates('Null')"],
+
+    # The source is usually a participant in the operation that generated the
+    # IDBRequest.
+    'IDBRequest.source':  ["@Creates('Null')"],
+
+    'IDBFactory.open': ["@Creates('Database')"],
+    'IDBFactory.webkitGetDatabaseNames': ["@Creates('DomStringList')"],
+
+    'IDBObjectStore.put': ["@_annotation_Creates_IDBKey"],
+    'IDBObjectStore.add': ["@_annotation_Creates_IDBKey"],
+    'IDBObjectStore.get': ["@annotation_Creates_SerializedScriptValue"],
+    'IDBObjectStore.openCursor': ["@Creates('Cursor')"],
+
+    'IDBIndex.get': ["@annotation_Creates_SerializedScriptValue"],
+    'IDBIndex.getKey': [
+      "@annotation_Creates_SerializedScriptValue",
+      # The source is the object store behind the index.
+      "@Creates('ObjectStore')",
+    ],
+    'IDBIndex.openCursor': ["@Creates('Cursor')"],
+    'IDBIndex.openKeyCursor': ["@Creates('Cursor')"],
+
+    'IDBCursorWithValue.value': [
+      '@annotation_Creates_SerializedScriptValue',
+      '@annotation_Returns_SerializedScriptValue',
+    ],
+
+    'IDBCursor.key': [
+      "@_annotation_Creates_IDBKey",
+      "@_annotation_Returns_IDBKey",
+    ],
+
+    '+IDBRequest': [
+      "@Returns('Request')",
+      "@Creates('Request')",
+    ],
+
+    '+IDBOpenDBRequest': [
+      "@Returns('Request')",
+      "@Creates('Request')",
+    ],
+
+    'MessageEvent.ports': ["@Creates('=List')"],
+
+    'MessageEvent.data': [
+      "@annotation_Creates_SerializedScriptValue",
+      "@annotation_Returns_SerializedScriptValue",
+    ],
+    'PopStateEvent.state': [
+      "@annotation_Creates_SerializedScriptValue",
+      "@annotation_Returns_SerializedScriptValue",
+    ],
+    'SerializedScriptValue': [
+      "@annotation_Creates_SerializedScriptValue",
+      "@annotation_Returns_SerializedScriptValue",
+    ],
+
+    'SQLResultSetRowList.item': ["@Creates('=Object')"],
+
+    'WebGLRenderingContext.getParameter': [
+      # Taken from http://www.khronos.org/registry/webgl/specs/latest/
+      # Section 5.14.3 Setting and getting state
+      "@Creates('Null|num|String|bool|=List|Float32List|Int32List|Uint32List"
+                "|Framebuffer|Renderbuffer|Texture')",
+      "@Returns('Null|num|String|bool|=List|Float32List|Int32List|Uint32List"
+                "|Framebuffer|Renderbuffer|Texture')",
+    ],
+
+    'XMLHttpRequest.response': [
+      "@Creates('ByteBuffer|Blob|Document|=Object|=List|String|num')",
+    ],
+}, dart2jsOnly=True)
+
+_indexed_db_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@SupportedBrowser(SupportedBrowser.FIREFOX, '15')",
+  "@SupportedBrowser(SupportedBrowser.IE, '10')",
+  "@Experimental",
+]
+
+_file_system_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@Experimental",
+]
+
+_all_but_ie9_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@SupportedBrowser(SupportedBrowser.FIREFOX)",
+  "@SupportedBrowser(SupportedBrowser.IE, '10')",
+  "@SupportedBrowser(SupportedBrowser.SAFARI)",
+]
+
+_history_annotations = _all_but_ie9_annotations
+
+_no_ie_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@SupportedBrowser(SupportedBrowser.FIREFOX)",
+  "@SupportedBrowser(SupportedBrowser.SAFARI)",
+]
+
+_performance_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@SupportedBrowser(SupportedBrowser.FIREFOX)",
+  "@SupportedBrowser(SupportedBrowser.IE)",
+]
+
+_rtc_annotations = [ # Note: Firefox nightly builds also support this.
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@Experimental",
+]
+
+_shadow_dom_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME, '26')",
+  "@Experimental",
+]
+
+_speech_recognition_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME, '25')",
+  "@Experimental",
+]
+
+_svg_annotations = _all_but_ie9_annotations;
+
+_web_sql_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@SupportedBrowser(SupportedBrowser.SAFARI)",
+  "@Experimental",
+]
+
+_webgl_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@SupportedBrowser(SupportedBrowser.FIREFOX)",
+  "@Experimental",
+]
+
+_webkit_experimental_annotations = [
+  "@SupportedBrowser(SupportedBrowser.CHROME)",
+  "@SupportedBrowser(SupportedBrowser.SAFARI)",
+  "@Experimental",
+]
+
+# Annotations to be placed on generated members.
+# The table is indexed as:
+#   INTERFACE:     annotations to be added to the interface declaration
+#   INTERFACE.MEMBER: annotation to be added to the member declaration
+_annotations = monitored.Dict('dartmetadata._annotations', {
+  'CSSHostRule': _shadow_dom_annotations,
+  'Crypto': _webkit_experimental_annotations,
+  'Database': _web_sql_annotations,
+  'DatabaseSync': _web_sql_annotations,
+  'DOMApplicationCache': [
+    "@SupportedBrowser(SupportedBrowser.CHROME)",
+    "@SupportedBrowser(SupportedBrowser.FIREFOX)",
+    "@SupportedBrowser(SupportedBrowser.IE, '10')",
+    "@SupportedBrowser(SupportedBrowser.OPERA)",
+    "@SupportedBrowser(SupportedBrowser.SAFARI)",
+  ],
+  'DOMFileSystem': _file_system_annotations,
+  'DOMFileSystemSync': _file_system_annotations,
+  'DOMWindow.webkitConvertPointFromNodeToPage': _webkit_experimental_annotations,
+  'DOMWindow.webkitConvertPointFromPageToNode': _webkit_experimental_annotations,
+  'DOMWindow.indexedDB': _indexed_db_annotations,
+  'DOMWindow.openDatabase': _web_sql_annotations,
+  'DOMWindow.performance': _performance_annotations,
+  'DOMWindow.webkitNotifications': _webkit_experimental_annotations,
+  'DOMWindow.webkitRequestFileSystem': _file_system_annotations,
+  'DOMWindow.webkitResolveLocalFileSystemURL': _file_system_annotations,
+  'Element.onwebkitTransitionEnd': _all_but_ie9_annotations,
+  # Placeholder to add experimental flag, implementation for this is
+  # pending in a separate CL.
+  'Element.webkitMatchesSelector': ['@Experimental()'],
+  'Element.webkitCreateShadowRoot': [
+    "@SupportedBrowser(SupportedBrowser.CHROME, '25')",
+    "@Experimental",
+  ],
+  'Event.clipboardData': _webkit_experimental_annotations,
+  'FormData': _all_but_ie9_annotations,
+  'HashChangeEvent': [
+    "@SupportedBrowser(SupportedBrowser.CHROME)",
+    "@SupportedBrowser(SupportedBrowser.FIREFOX)",
+    "@SupportedBrowser(SupportedBrowser.SAFARI)",
+  ],
+  'History.pushState': _history_annotations,
+  'History.replaceState': _history_annotations,
+  'HTMLContentElement': _shadow_dom_annotations,
+  'HTMLDataListElement': _all_but_ie9_annotations,
+  'HTMLDetailsElement': _webkit_experimental_annotations,
+  'HTMLEmbedElement': [
+    "@SupportedBrowser(SupportedBrowser.CHROME)",
+    "@SupportedBrowser(SupportedBrowser.IE)",
+    "@SupportedBrowser(SupportedBrowser.SAFARI)",
+  ],
+  'HTMLKeygenElement': _webkit_experimental_annotations,
+  'HTMLMeterElement': _no_ie_annotations,
+  'HTMLObjectElement': [
+    "@SupportedBrowser(SupportedBrowser.CHROME)",
+    "@SupportedBrowser(SupportedBrowser.IE)",
+    "@SupportedBrowser(SupportedBrowser.SAFARI)",
+  ],
+  'HTMLOutputElement': _no_ie_annotations,
+  'HTMLProgressElement': _all_but_ie9_annotations,
+  'HTMLShadowElement': _shadow_dom_annotations,
+  'HTMLTrackElement': [
+    "@SupportedBrowser(SupportedBrowser.CHROME)",
+    "@SupportedBrowser(SupportedBrowser.IE, '10')",
+    "@SupportedBrowser(SupportedBrowser.SAFARI)",
+  ],
+  'IDBFactory': _indexed_db_annotations,
+  'IDBDatabase': _indexed_db_annotations,
+  'LocalMediaStream': _rtc_annotations,
+  'MediaStream': _rtc_annotations,
+  'MediaStreamEvent': _rtc_annotations,
+  'MediaStreamTrack': _rtc_annotations,
+  'MediaStreamTrackEvent': _rtc_annotations,
+  'MutationObserver': [
+    "@SupportedBrowser(SupportedBrowser.CHROME)",
+    "@SupportedBrowser(SupportedBrowser.FIREFOX)",
+    "@SupportedBrowser(SupportedBrowser.SAFARI)",
+    "@Experimental",
+  ],
+  'NotificationCenter': _webkit_experimental_annotations,
+  'Performance': _performance_annotations,
+  'PopStateEvent': _history_annotations,
+  'RTCIceCandidate': _rtc_annotations,
+  'RTCPeerConnection': _rtc_annotations,
+  'RTCSessionDescription': _rtc_annotations,
+  'ShadowRoot': _shadow_dom_annotations,
+  'SpeechRecognition': _speech_recognition_annotations,
+  'SpeechRecognitionAlternative': _speech_recognition_annotations,
+  'SpeechRecognitionError': _speech_recognition_annotations,
+  'SpeechRecognitionEvent': _speech_recognition_annotations,
+  'SpeechRecognitionResult': _speech_recognition_annotations,
+  'SVGAltGlyphElement': _no_ie_annotations,
+  'SVGAnimateElement': _no_ie_annotations,
+  'SVGAnimateMotionElement': _no_ie_annotations,
+  'SVGAnimateTransformElement': _no_ie_annotations,
+  'SVGFEBlendElement': _svg_annotations,
+  'SVGFEColorMatrixElement': _svg_annotations,
+  'SVGFEComponentTransferElement': _svg_annotations,
+  'SVGFEConvolveMatrixElement': _svg_annotations,
+  'SVGFEDiffuseLightingElement': _svg_annotations,
+  'SVGFEDisplacementMapElement': _svg_annotations,
+  'SVGFEDistantLightElement': _svg_annotations,
+  'SVGFEFloodElement': _svg_annotations,
+  'SVGFEFuncAElement': _svg_annotations,
+  'SVGFEFuncBElement': _svg_annotations,
+  'SVGFEFuncGElement': _svg_annotations,
+  'SVGFEFuncRElement': _svg_annotations,
+  'SVGFEGaussianBlurElement': _svg_annotations,
+  'SVGFEImageElement': _svg_annotations,
+  'SVGFEMergeElement': _svg_annotations,
+  'SVGFEMergeNodeElement': _svg_annotations,
+  'SVGFEMorphologyElement': _svg_annotations,
+  'SVGFEOffsetElement': _svg_annotations,
+  'SVGFEPointLightElement': _svg_annotations,
+  'SVGFESpecularLightingElement': _svg_annotations,
+  'SVGFESpotLightElement': _svg_annotations,
+  'SVGFETileElement': _svg_annotations,
+  'SVGFETurbulenceElement': _svg_annotations,
+  'SVGFilterElement': _svg_annotations,
+  'SVGForeignObjectElement': _no_ie_annotations,
+  'SVGSetElement': _no_ie_annotations,
+  'SQLTransaction': _web_sql_annotations,
+  'SQLTransactionSync': _web_sql_annotations,
+  'WebGLRenderingContext': _webgl_annotations,
+  'WebKitCSSMatrix': _webkit_experimental_annotations,
+  'WebKitPoint': _webkit_experimental_annotations,
+  'WebSocket': _all_but_ie9_annotations,
+  'Worker': _all_but_ie9_annotations,
+  'XMLHttpRequest.onloadend': _all_but_ie9_annotations,
+  'XMLHttpRequest.onprogress': _all_but_ie9_annotations,
+  'XMLHttpRequest.response': _all_but_ie9_annotations,
+  'XMLHttpRequestProgressEvent': _webkit_experimental_annotations,
+  'XSLTProcessor': [
+    "@SupportedBrowser(SupportedBrowser.CHROME)",
+    "@SupportedBrowser(SupportedBrowser.FIREFOX)",
+    "@SupportedBrowser(SupportedBrowser.SAFARI)",
+  ],
+})
+
+
+class DartMetadata(object):
+  def __init__(self, api_status_path, doc_comments_path):
+    self._api_status_path = api_status_path
+    status_file = open(self._api_status_path, 'r+')
+    self._types = json.load(status_file)
+    status_file.close()
+
+    comments_file = open(doc_comments_path, 'r+')
+    self._doc_comments = json.load(comments_file)
+    comments_file.close()
+
+  def GetFormattedMetadata(self, library_name, interface_name, member_id=None,
+      indentation=''):
+    """ Gets all comments and annotations for an interface or member.
+    """
+    return self.FormatMetadata(
+        self.GetMetadata(library_name, interface_name, member_id),
+        indentation)
+
+  def GetMetadata(self, library_name, interface_name,
+        member_name=None, source_member_name=None):
+    """ Gets all comments and annotations for an interface or member.
+
+    Args:
+      source_member_name: If the member is dependent on a different member
+        then this is used to apply the support annotations from the other
+        member.
+    """
+    annotations = self._GetComments(library_name, interface_name, member_name)
+    annotations = annotations + self._GetCommonAnnotations(
+        interface_name, member_name, source_member_name)
+
+    return annotations
+
+  def GetDart2JSMetadata(self, idl_type, library_name,
+      interface_name, member_name,):
+    """ Gets all annotations for Dart2JS members- including annotations for
+    both dart2js and dartium.
+    """
+    annotations = self.GetMetadata(library_name, interface_name, member_name)
+
+    ann2 = self._GetDart2JSSpecificAnnotations(idl_type, interface_name, member_name)
+    if ann2:
+      if annotations:
+        annotations.extend(ann2)
+      else:
+        annotations = ann2
+    return annotations
+
+  def _GetCommonAnnotations(self, interface_name, member_name=None,
+      source_member_name=None):
+    if member_name:
+      key = '%s.%s' % (interface_name, member_name)
+    else:
+      key = interface_name
+
+    annotations = ["@DomName('" + key + "')"]
+
+    # Only add this for members, so we don't add DocsEditable to templated
+    # classes (they get it from the default class template)
+    if member_name:
+      annotations.append('@DocsEditable');
+
+    if key in _annotations:
+      annotations.extend(_annotations[key])
+
+    if (member_name and member_name.startswith('webkit') and
+        key not in renamed_html_members):
+      annotations.extend(_webkit_experimental_annotations)
+
+    if source_member_name:
+      member_name = source_member_name
+
+    # TODO(blois): Emit support level annotations
+    self._GetSupportLevelAnnotation(interface_name, member_name)
+
+    return annotations
+
+  def _GetComments(self, library_name, interface_name, member_name=None):
+    """ Gets all comments for the interface or member and returns a list. """
+
+    # Add documentation from JSON.
+    comments = []
+    library_name = 'dart.dom.%s' % library_name
+    if library_name in self._doc_comments:
+      library_info = self._doc_comments[library_name]
+      if interface_name in library_info:
+        interface_info = library_info[interface_name]
+        if member_name:
+          if 'members' in interface_info and member_name in interface_info['members']:
+            comments = interface_info['members'][member_name]
+        elif 'comment' in interface_info:
+          comments = interface_info['comment']
+
+    if comments:
+      comments = ['\n'.join(comments)]
+
+    return comments
+
+
+  def AnyConversionAnnotations(self, idl_type, interface_name, member_name):
+    if (_annotations.get('%s.%s' % (interface_name, member_name)) or
+        self._GetDart2JSSpecificAnnotations(idl_type, interface_name, member_name)):
+      return True
+    else:
+      return False
+
+  def FormatMetadata(self, metadata, indentation):
+    if metadata:
+      newline = '\n%s' % indentation
+      result = newline.join(metadata) + newline
+      return result
+    return ''
+
+  def _GetDart2JSSpecificAnnotations(self, idl_type, interface_name, member_name):
+    """ Finds dart2js-specific annotations. This does not include ones shared with
+    dartium.
+    """
+    ann1 = _dart2js_annotations.get("%s.%s" % (interface_name, member_name))
+    if ann1:
+      ann2 = _dart2js_annotations.get('+' + idl_type)
+      if ann2:
+        return ann2 + ann1
+      ann2 = _dart2js_annotations.get(idl_type)
+      if ann2:
+        return ann2 + ann1
+      return ann1
+
+    ann2 = _dart2js_annotations.get('-' + idl_type)
+    if ann2:
+      return ann2
+    ann2 = _dart2js_annotations.get(idl_type)
+    return ann2
+
+  def _GetSupportLevel(self, interface_id, member_id=None):
+    """ Looks up the interface or member in the DOM status list and returns the
+    support level for it.
+    """
+    if interface_id in self._types:
+      type_info = self._types[interface_id]
+    else:
+      type_info = {
+        'members': {},
+        'support_level': 'untriaged',
+      }
+      self._types[interface_id] = type_info
+
+    if not member_id:
+      return type_info.get('support_level')
+
+    members = type_info['members']
+
+    if member_id in members:
+      member_info = members[member_id]
+    else:
+      if member_id == interface_id:
+        member_info = {}
+      else:
+        member_info = {'support_level': 'untriaged'}
+      members[member_id] = member_info
+
+    support_level = member_info.get('support_level')
+    # If unset then it inherits from the type.
+    if not support_level:
+      support_level = type_info.get('support_level')
+    return support_level
+
+  def _GetSupportLevelAnnotation(self, interface_id, member_id=None):
+    support_level = self._GetSupportLevel(interface_id, member_id)
+
+    if support_level == 'untriaged':
+      return '@Experimental'
+    elif support_level == 'experimental':
+      return '@Experimental'
+    elif support_level == 'nonstandard':
+      return '@Experimental'
+    elif support_level == 'stable':
+      return
+    elif support_level == 'deprecated':
+      return '@Deprecated'
+    else:
+      _logger.warn('Unknown support_level - %s:%s' % (interface.id, member_id))
+
+  def Flush(self):
+    json_file = open(self._api_status_path, 'w+')
+    json.dump(self._types, json_file, indent=2, separators=(',', ': '), sort_keys=True)
+    json_file.close()
diff --git a/tools/dom/scripts/generator.py b/tools/dom/scripts/generator.py
index 4ace8f6..c36ec9c 100644
--- a/tools/dom/scripts/generator.py
+++ b/tools/dom/scripts/generator.py
@@ -14,11 +14,6 @@
 from htmlrenamer import html_interface_renames, renamed_html_members, \
      typed_array_renames
 
-# Set up json file for retrieving comments.
-_current_dir = os.path.dirname(__file__)
-_json_path = os.path.join(_current_dir, '..', 'docs', 'docs.json')
-_dom_json = json.load(open(_json_path))
-
 _pure_interfaces = monitored.Set('generator._pure_interfaces', [
     # TODO(sra): DOMStringMap should be a class implementing Map<String,String>.
     'DOMStringMap',
@@ -532,467 +527,6 @@
           table.get('%s %s' % (idl_type, direction)))
   return None
 
-# ------------------------------------------------------------------------------
-
-# Annotations to be placed on native members.  The table is indexed by the IDL
-# interface and member name, and by IDL return or field type name.  Both are
-# used to assemble the annotations:
-#
-#   INTERFACE.MEMBER: annotations for member.
-#   +TYPE:            add annotations only if there are member annotations.
-#   -TYPE:            add annotations only if there are no member annotations.
-#   TYPE:             add regardless of member annotations.
-
-dart2js_annotations = monitored.Dict('generator.dart2js_annotations', {
-
-    'ArrayBufferView': [
-      "@Creates('TypedData')",
-      "@Returns('TypedData|Null')",
-    ],
-
-    'CanvasRenderingContext2D.createImageData': [
-      "@Creates('ImageData|=Object')",
-    ],
-
-    'CanvasRenderingContext2D.getImageData': [
-      "@Creates('ImageData|=Object')",
-    ],
-
-    'CanvasRenderingContext2D.webkitGetImageDataHD': [
-      "@Creates('ImageData|=Object')",
-    ],
-
-    'CanvasRenderingContext2D.fillStyle': [
-      "@Creates('String|CanvasGradient|CanvasPattern')",
-      "@Returns('String|CanvasGradient|CanvasPattern')",
-    ],
-
-    'CanvasRenderingContext2D.strokeStyle': [
-      "@Creates('String|CanvasGradient|CanvasPattern')",
-      "@Returns('String|CanvasGradient|CanvasPattern')",
-    ],
-
-    # Methods returning Window can return a local window, or a cross-frame
-    # window (=Object) that needs wrapping.
-    'DOMWindow': [
-      "@Creates('Window|=Object')",
-      "@Returns('Window|=Object')",
-    ],
-
-    'DOMWindow.openDatabase': [
-      "@Creates('SqlDatabase')",
-    ],
-
-    # To be in callback with the browser-created Event, we had to have called
-    # addEventListener on the target, so we avoid
-    'Event.currentTarget': [
-      "@Creates('Null')",
-      "@Returns('EventTarget|=Object')",
-    ],
-
-    # Only nodes in the DOM bubble and have target !== currentTarget.
-    'Event.target': [
-      "@Creates('Node')",
-      "@Returns('EventTarget|=Object')",
-    ],
-
-    'MouseEvent.relatedTarget': [
-      "@Creates('Node')",
-      "@Returns('EventTarget|=Object')",
-    ],
-
-    # Touch targets are Elements in a Document, or the Document.
-    'Touch.target': [
-      "@Creates('Element|Document')",
-      "@Returns('Element|Document')",
-    ],
-
-    'FileReader.result': ["@Creates('String|ByteBuffer|Null')"],
-
-    # Rather than have the result of an IDBRequest as a union over all possible
-    # results, we mark the result as instantiating any classes, and mark
-    # each operation with the classes that it could cause to be asynchronously
-    # instantiated.
-    'IDBRequest.result': ["@Creates('Null')"],
-
-    # The source is usually a participant in the operation that generated the
-    # IDBRequest.
-    'IDBRequest.source':  ["@Creates('Null')"],
-
-    'IDBFactory.open': ["@Creates('Database')"],
-    'IDBFactory.webkitGetDatabaseNames': ["@Creates('DomStringList')"],
-
-    'IDBObjectStore.put': ["@_annotation_Creates_IDBKey"],
-    'IDBObjectStore.add': ["@_annotation_Creates_IDBKey"],
-    'IDBObjectStore.get': ["@annotation_Creates_SerializedScriptValue"],
-    'IDBObjectStore.openCursor': ["@Creates('Cursor')"],
-
-    'IDBIndex.get': ["@annotation_Creates_SerializedScriptValue"],
-    'IDBIndex.getKey': [
-      "@annotation_Creates_SerializedScriptValue",
-      # The source is the object store behind the index.
-      "@Creates('ObjectStore')",
-    ],
-    'IDBIndex.openCursor': ["@Creates('Cursor')"],
-    'IDBIndex.openKeyCursor': ["@Creates('Cursor')"],
-
-    'IDBCursorWithValue.value': [
-      '@annotation_Creates_SerializedScriptValue',
-      '@annotation_Returns_SerializedScriptValue',
-    ],
-
-    'IDBCursor.key': [
-      "@_annotation_Creates_IDBKey",
-      "@_annotation_Returns_IDBKey",
-    ],
-
-    '+IDBRequest': [
-      "@Returns('Request')",
-      "@Creates('Request')",
-    ],
-
-    '+IDBOpenDBRequest': [
-      "@Returns('Request')",
-      "@Creates('Request')",
-    ],
-
-    'MessageEvent.ports': ["@Creates('=List')"],
-
-    'MessageEvent.data': [
-      "@annotation_Creates_SerializedScriptValue",
-      "@annotation_Returns_SerializedScriptValue",
-    ],
-    'PopStateEvent.state': [
-      "@annotation_Creates_SerializedScriptValue",
-      "@annotation_Returns_SerializedScriptValue",
-    ],
-    'SerializedScriptValue': [
-      "@annotation_Creates_SerializedScriptValue",
-      "@annotation_Returns_SerializedScriptValue",
-    ],
-
-    'SQLResultSetRowList.item': ["@Creates('=Object')"],
-
-    'WebGLRenderingContext.getParameter': [
-      # Taken from http://www.khronos.org/registry/webgl/specs/latest/
-      # Section 5.14.3 Setting and getting state
-      "@Creates('Null|num|String|bool|=List|Float32List|Int32List|Uint32List"
-                "|Framebuffer|Renderbuffer|Texture')",
-      "@Returns('Null|num|String|bool|=List|Float32List|Int32List|Uint32List"
-                "|Framebuffer|Renderbuffer|Texture')",
-    ],
-
-    'XMLHttpRequest.response': [
-      "@Creates('ByteBuffer|Blob|Document|=Object|=List|String|num')",
-    ],
-}, dart2jsOnly=True)
-
-_indexed_db_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@SupportedBrowser(SupportedBrowser.FIREFOX, '15')",
-  "@SupportedBrowser(SupportedBrowser.IE, '10')",
-  "@Experimental",
-]
-
-_file_system_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@Experimental",
-]
-
-_all_but_ie9_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@SupportedBrowser(SupportedBrowser.FIREFOX)",
-  "@SupportedBrowser(SupportedBrowser.IE, '10')",
-  "@SupportedBrowser(SupportedBrowser.SAFARI)",
-]
-
-_history_annotations = _all_but_ie9_annotations
-
-_no_ie_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@SupportedBrowser(SupportedBrowser.FIREFOX)",
-  "@SupportedBrowser(SupportedBrowser.SAFARI)",
-]
-
-_performance_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@SupportedBrowser(SupportedBrowser.FIREFOX)",
-  "@SupportedBrowser(SupportedBrowser.IE)",
-]
-
-_rtc_annotations = [ # Note: Firefox nightly builds also support this.
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@Experimental",
-]
-
-_shadow_dom_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME, '26')",
-  "@Experimental",
-]
-
-_speech_recognition_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME, '25')",
-  "@Experimental",
-]
-
-_svg_annotations = _all_but_ie9_annotations;
-
-_web_sql_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@SupportedBrowser(SupportedBrowser.SAFARI)",
-  "@Experimental",
-]
-
-_webgl_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@SupportedBrowser(SupportedBrowser.FIREFOX)",
-  "@Experimental",
-]
-
-_webkit_experimental_annotations = [
-  "@SupportedBrowser(SupportedBrowser.CHROME)",
-  "@SupportedBrowser(SupportedBrowser.SAFARI)",
-  "@Experimental",
-]
-
-# Annotations to be placed on generated members.
-# The table is indexed as:
-#   INTERFACE:     annotations to be added to the interface declaration
-#   INTERFACE.MEMBER: annotation to be added to the member declaration
-dart_annotations = monitored.Dict('generator.dart_annotations', {
-  'CSSHostRule': _shadow_dom_annotations,
-  'Crypto': _webkit_experimental_annotations,
-  'Database': _web_sql_annotations,
-  'DatabaseSync': _web_sql_annotations,
-  'DOMApplicationCache': [
-    "@SupportedBrowser(SupportedBrowser.CHROME)",
-    "@SupportedBrowser(SupportedBrowser.FIREFOX)",
-    "@SupportedBrowser(SupportedBrowser.IE, '10')",
-    "@SupportedBrowser(SupportedBrowser.OPERA)",
-    "@SupportedBrowser(SupportedBrowser.SAFARI)",
-  ],
-  'DOMFileSystem': _file_system_annotations,
-  'DOMFileSystemSync': _file_system_annotations,
-  'DOMWindow.webkitConvertPointFromNodeToPage': _webkit_experimental_annotations,
-  'DOMWindow.webkitConvertPointFromPageToNode': _webkit_experimental_annotations,
-  'DOMWindow.indexedDB': _indexed_db_annotations,
-  'DOMWindow.openDatabase': _web_sql_annotations,
-  'DOMWindow.performance': _performance_annotations,
-  'DOMWindow.webkitNotifications': _webkit_experimental_annotations,
-  'DOMWindow.webkitRequestFileSystem': _file_system_annotations,
-  'DOMWindow.webkitResolveLocalFileSystemURL': _file_system_annotations,
-  'Element.onwebkitTransitionEnd': _all_but_ie9_annotations,
-  # Placeholder to add experimental flag, implementation for this is
-  # pending in a separate CL.
-  'Element.webkitMatchesSelector': ['@Experimental()'],
-  'Element.webkitCreateShadowRoot': [
-    "@SupportedBrowser(SupportedBrowser.CHROME, '25')",
-    "@Experimental",
-  ],
-  'Event.clipboardData': _webkit_experimental_annotations,
-  'FormData': _all_but_ie9_annotations,
-  'HashChangeEvent': [
-    "@SupportedBrowser(SupportedBrowser.CHROME)",
-    "@SupportedBrowser(SupportedBrowser.FIREFOX)",
-    "@SupportedBrowser(SupportedBrowser.SAFARI)",
-  ],
-  'History.pushState': _history_annotations,
-  'History.replaceState': _history_annotations,
-  'HTMLContentElement': _shadow_dom_annotations,
-  'HTMLDataListElement': _all_but_ie9_annotations,
-  'HTMLDetailsElement': _webkit_experimental_annotations,
-  'HTMLEmbedElement': [
-    "@SupportedBrowser(SupportedBrowser.CHROME)",
-    "@SupportedBrowser(SupportedBrowser.IE)",
-    "@SupportedBrowser(SupportedBrowser.SAFARI)",
-  ],
-  'HTMLKeygenElement': _webkit_experimental_annotations,
-  'HTMLMeterElement': _no_ie_annotations,
-  'HTMLObjectElement': [
-    "@SupportedBrowser(SupportedBrowser.CHROME)",
-    "@SupportedBrowser(SupportedBrowser.IE)",
-    "@SupportedBrowser(SupportedBrowser.SAFARI)",
-  ],
-  'HTMLOutputElement': _no_ie_annotations,
-  'HTMLProgressElement': _all_but_ie9_annotations,
-  'HTMLShadowElement': _shadow_dom_annotations,
-  'HTMLTrackElement': [
-    "@SupportedBrowser(SupportedBrowser.CHROME)",
-    "@SupportedBrowser(SupportedBrowser.IE, '10')",
-    "@SupportedBrowser(SupportedBrowser.SAFARI)",
-  ],
-  'IDBFactory': _indexed_db_annotations,
-  'IDBDatabase': _indexed_db_annotations,
-  'LocalMediaStream': _rtc_annotations,
-  'MediaStream': _rtc_annotations,
-  'MediaStreamEvent': _rtc_annotations,
-  'MediaStreamTrack': _rtc_annotations,
-  'MediaStreamTrackEvent': _rtc_annotations,
-  'MutationObserver': [
-    "@SupportedBrowser(SupportedBrowser.CHROME)",
-    "@SupportedBrowser(SupportedBrowser.FIREFOX)",
-    "@SupportedBrowser(SupportedBrowser.SAFARI)",
-    "@Experimental",
-  ],
-  'NotificationCenter': _webkit_experimental_annotations,
-  'Performance': _performance_annotations,
-  'PopStateEvent': _history_annotations,
-  'RTCIceCandidate': _rtc_annotations,
-  'RTCPeerConnection': _rtc_annotations,
-  'RTCSessionDescription': _rtc_annotations,
-  'ShadowRoot': _shadow_dom_annotations,
-  'SpeechRecognition': _speech_recognition_annotations,
-  'SpeechRecognitionAlternative': _speech_recognition_annotations,
-  'SpeechRecognitionError': _speech_recognition_annotations,
-  'SpeechRecognitionEvent': _speech_recognition_annotations,
-  'SpeechRecognitionResult': _speech_recognition_annotations,
-  'SVGAltGlyphElement': _no_ie_annotations,
-  'SVGAnimateElement': _no_ie_annotations,
-  'SVGAnimateMotionElement': _no_ie_annotations,
-  'SVGAnimateTransformElement': _no_ie_annotations,
-  'SVGFEBlendElement': _svg_annotations,
-  'SVGFEColorMatrixElement': _svg_annotations,
-  'SVGFEComponentTransferElement': _svg_annotations,
-  'SVGFEConvolveMatrixElement': _svg_annotations,
-  'SVGFEDiffuseLightingElement': _svg_annotations,
-  'SVGFEDisplacementMapElement': _svg_annotations,
-  'SVGFEDistantLightElement': _svg_annotations,
-  'SVGFEFloodElement': _svg_annotations,
-  'SVGFEFuncAElement': _svg_annotations,
-  'SVGFEFuncBElement': _svg_annotations,
-  'SVGFEFuncGElement': _svg_annotations,
-  'SVGFEFuncRElement': _svg_annotations,
-  'SVGFEGaussianBlurElement': _svg_annotations,
-  'SVGFEImageElement': _svg_annotations,
-  'SVGFEMergeElement': _svg_annotations,
-  'SVGFEMergeNodeElement': _svg_annotations,
-  'SVGFEMorphologyElement': _svg_annotations,
-  'SVGFEOffsetElement': _svg_annotations,
-  'SVGFEPointLightElement': _svg_annotations,
-  'SVGFESpecularLightingElement': _svg_annotations,
-  'SVGFESpotLightElement': _svg_annotations,
-  'SVGFETileElement': _svg_annotations,
-  'SVGFETurbulenceElement': _svg_annotations,
-  'SVGFilterElement': _svg_annotations,
-  'SVGForeignObjectElement': _no_ie_annotations,
-  'SVGSetElement': _no_ie_annotations,
-  'SQLTransaction': _web_sql_annotations,
-  'SQLTransactionSync': _web_sql_annotations,
-  'WebGLRenderingContext': _webgl_annotations,
-  'WebKitCSSMatrix': _webkit_experimental_annotations,
-  'WebKitPoint': _webkit_experimental_annotations,
-  'WebSocket': _all_but_ie9_annotations,
-  'Worker': _all_but_ie9_annotations,
-  'XMLHttpRequest.onloadend': _all_but_ie9_annotations,
-  'XMLHttpRequest.onprogress': _all_but_ie9_annotations,
-  'XMLHttpRequest.response': _all_but_ie9_annotations,
-  'XMLHttpRequestProgressEvent': _webkit_experimental_annotations,
-  'XSLTProcessor': [
-    "@SupportedBrowser(SupportedBrowser.CHROME)",
-    "@SupportedBrowser(SupportedBrowser.FIREFOX)",
-    "@SupportedBrowser(SupportedBrowser.SAFARI)",
-  ],
-})
-
-def GetComments(library_name, interface_name, member_name=None):
-  """ Finds all comments for the interface or member and returns a list. """
-
-  # Add documentation from JSON.
-  comments = []
-  library_name = 'dart.dom.%s' % library_name
-  if library_name in _dom_json and interface_name in _dom_json[library_name]:
-    if (member_name and 'members' in _dom_json[library_name][interface_name] and
-        (member_name in _dom_json[library_name][interface_name]['members'])):
-      comments = _dom_json[library_name][interface_name]['members'][member_name]
-    elif (not member_name and 'comment' in
-          _dom_json[library_name][interface_name]):
-      comments = _dom_json[library_name][interface_name]['comment']
-
-  if (len(comments)):
-    comments = ['\n'.join(comments)]
-
-  return comments
-
-def GetAnnotationsAndComments(library_name, interface_name, member_name=None):
-  annotations = GetComments(library_name, interface_name, member_name)
-  annotations = annotations + (FindCommonAnnotations(library_name, interface_name,
-                                                     member_name))
-
-  return annotations
-
-def FindCommonAnnotations(library_name, interface_name, member_name=None):
-  """ Finds annotations common between dart2js and dartium.
-  """
-  if member_name:
-    key = '%s.%s' % (interface_name, member_name)
-  else:
-    key = interface_name
-
-  annotations = ["@DomName('" + key + "')"]
-
-  # Only add this for members, so we don't add DocsEditable to templated classes
-  # (they get it from the default class template)
-  if member_name:
-    annotations.append('@DocsEditable');
-
-  if (dart_annotations.get(key) != None):
-    annotations.extend(dart_annotations.get(key))
-
-  if (member_name and member_name.startswith('webkit') and
-      key not in renamed_html_members):
-    annotations.extend(_webkit_experimental_annotations)
-
-  return annotations
-
-def FindDart2JSAnnotationsAndComments(idl_type, library_name, interface_name,
-                                      member_name,):
-  """ Finds all annotations for Dart2JS members- including annotations for
-  both dart2js and dartium.
-  """
-  annotations = GetAnnotationsAndComments(library_name, interface_name, member_name)
-
-  ann2 = _FindDart2JSSpecificAnnotations(idl_type, interface_name, member_name)
-  if ann2:
-    if annotations:
-      annotations.extend(ann2)
-    else:
-      annotations = ann2
-  return annotations
-
-def AnyConversionAnnotations(idl_type, interface_name, member_name):
-  if (dart_annotations.get('%s.%s' % (interface_name, member_name)) or
-      _FindDart2JSSpecificAnnotations(idl_type, interface_name, member_name)):
-    return True
-  else:
-    return False
-
-def FormatAnnotationsAndComments(annotations, indentation):
-  if annotations:
-
-    newline = '\n%s' % indentation
-    result = newline.join(annotations) + newline
-    return result
-  return ''
-
-def _FindDart2JSSpecificAnnotations(idl_type, interface_name, member_name):
-  """ Finds dart2js-specific annotations. This does not include ones shared with
-  dartium.
-  """
-  ann1 = dart2js_annotations.get("%s.%s" % (interface_name, member_name))
-  if ann1:
-    ann2 = dart2js_annotations.get('+' + idl_type)
-    if ann2:
-      return ann2 + ann1
-    ann2 = dart2js_annotations.get(idl_type)
-    if ann2:
-      return ann2 + ann1
-    return ann1
-
-  ann2 = dart2js_annotations.get('-' + idl_type)
-  if ann2:
-    return ann2
-  ann2 = dart2js_annotations.get(idl_type)
-  return ann2
 
 # ------------------------------------------------------------------------------
 
diff --git a/tools/dom/scripts/htmldartgenerator.py b/tools/dom/scripts/htmldartgenerator.py
index 55dfa25..6ecb34e 100644
--- a/tools/dom/scripts/htmldartgenerator.py
+++ b/tools/dom/scripts/htmldartgenerator.py
@@ -9,8 +9,7 @@
 import emitter
 from generator import AnalyzeOperation, ConstantOutputOrder, \
     DartDomNameOfAttribute, FindMatchingAttribute, IsDartCollectionType, \
-    IsPureInterface, TypeOrNothing, GetAnnotationsAndComments, \
-    FormatAnnotationsAndComments, ConvertToFuture, GetCallbackInfo
+    IsPureInterface, TypeOrNothing, ConvertToFuture, GetCallbackInfo
 from htmlrenamer import convert_to_future_members
 
 # Types that are accessible cross-frame in a limited fashion.
@@ -35,6 +34,7 @@
     self._type_registry = options.type_registry
     self._interface_type_info = self._type_registry.TypeInfo(self._interface.id)
     self._renamer = options.renamer
+    self._metadata = options.metadata
     self._library_name = self._renamer.GetLibraryName(self._interface)
 
   def EmitSupportCheck(self):
@@ -345,9 +345,8 @@
     if self.GenerateCustomFactory(constructor_info):
       return
 
-    annotations = FormatAnnotationsAndComments(
-        GetAnnotationsAndComments(self._library_name, self._interface.id,
-                                  self._interface.id), '  ')
+    metadata = self._metadata.GetFormattedMetadata(
+        self._library_name, self._interface.id, self._interface.id, '  ')
 
     if not factory_constructor_name:
       factory_constructor_name = '_create'
@@ -364,19 +363,19 @@
 
       if not has_optional:
         self._members_emitter.Emit(
-            '\n  $(ANNOTATIONS)'
+            '\n  $(METADATA)'
             'factory $CTOR($PARAMS) => '
             '$FACTORY.$CTOR_FACTORY_NAME($FACTORY_PARAMS);\n',
             CTOR=constructor_info._ConstructorFullName(self._DartType),
             PARAMS=constructor_info.ParametersDeclaration(self._DartType),
             FACTORY=factory_name,
-            ANNOTATIONS=annotations,
+            METADATA=metadata,
             CTOR_FACTORY_NAME=factory_constructor_name,
             FACTORY_PARAMS=factory_parameters)
       else:
         if has_factory_provider:
           dispatcher_emitter = self._members_emitter.Emit(
-              '\n  $(ANNOTATIONS)'
+              '\n  $(METADATA)'
               'factory $CTOR($PARAMS) {\n'
               '$!DISPATCHER'
               '    return $FACTORY._create($FACTORY_PARAMS);\n'
@@ -384,7 +383,7 @@
               CTOR=constructor_info._ConstructorFullName(self._DartType),
               PARAMS=constructor_info.ParametersDeclaration(self._DartType),
               FACTORY=factory_name,
-              ANNOTATIONS=annotations,
+              METADATA=metadata,
               FACTORY_PARAMS=constructor_info.ParametersAsArgumentList())
 
           for index, param_info in enumerate(constructor_info.param_infos):
@@ -398,14 +397,14 @@
                 FACTORY_PARAMS=constructor_info.ParametersAsArgumentList(index))
         else:
           inits = self._members_emitter.Emit(
-              '\n  $(ANNOTATIONS)'
+              '\n  $(METADATA)'
               'factory $CONSTRUCTOR($PARAMS) {\n'
               '    var e = $FACTORY.$CTOR_FACTORY_NAME($FACTORY_PARAMS);\n'
               '$!INITS'
               '    return e;\n'
               '  }\n',
               CONSTRUCTOR=constructor_info._ConstructorFullName(self._DartType),
-              ANNOTATIONS=annotations,
+              METADATA=metadata,
               FACTORY=factory_name,
               CTOR_FACTORY_NAME=factory_constructor_name,
               PARAMS=constructor_info.ParametersDeclaration(self._DartType),
@@ -438,12 +437,12 @@
           constructor_info.idl_args,
           False,
           [info.name for info in constructor_info.param_infos],
-          emitter.Format('$(ANNOTATIONS)$FACTORY_KEYWORD $CTOR($PARAMS)',
+          emitter.Format('$(METADATA)$FACTORY_KEYWORD $CTOR($PARAMS)',
             FACTORY_KEYWORD=('factory' if not custom_factory_ctr else
                 'static %s' % constructor_full_name),
             CTOR=(('' if not custom_factory_ctr else '_factory')
                 + constructor_full_name),
-            ANNOTATIONS=annotations,
+            METADATA=metadata,
             PARAMS=constructor_info.ParametersDeclaration(self._DartType)),
           GenerateCall,
           IsOptional)
@@ -457,13 +456,13 @@
         self._database.GetInterface(info.callback_args[0].type_id))
 
     param_list = info.ParametersAsArgumentList()
-    annotations = ''
+    metadata = ''
     if '_RenamingAnnotation' in dir(self):
-      annotations = (self._RenamingAnnotation(info.declared_name, html_name) +
-          self._Annotations(info.type_name, info.declared_name))
+      metadata = (self._RenamingAnnotation(info.declared_name, html_name) +
+          self._Metadata(info.type_name, info.declared_name))
     self._members_emitter.Emit(
         '\n'
-        '  $ANNOTATIONS$MODIFIERS$TYPE$FUTURE_GENERIC $NAME($PARAMS) {\n'
+        '  $METADATA$MODIFIERS$TYPE$FUTURE_GENERIC $NAME($PARAMS) {\n'
         '    var completer = new Completer$(FUTURE_GENERIC)();\n'
         '    $ORIGINAL_FUNCTION($PARAMS_LIST\n'
         '        $NAMED_PARAM($VARIABLE_NAME) { '
@@ -471,7 +470,7 @@
         '$ERROR_CALLBACK);\n'
         '    return completer.future;\n'
         '  }\n',
-        ANNOTATIONS=annotations,
+        METADATA=metadata,
         MODIFIERS='static ' if info.IsStatic() else '',
         TYPE=self.SecureOutputType(info.type_name),
         NAME=html_name[1:],
diff --git a/tools/dom/scripts/htmleventgenerator.py b/tools/dom/scripts/htmleventgenerator.py
index 59a8955..4c0fac0 100644
--- a/tools/dom/scripts/htmleventgenerator.py
+++ b/tools/dom/scripts/htmleventgenerator.py
@@ -7,7 +7,6 @@
 
 import logging
 import monitored
-from generator import GetAnnotationsAndComments, FormatAnnotationsAndComments
 
 _logger = logging.getLogger('dartgenerator')
 
@@ -215,10 +214,11 @@
 
 class HtmlEventGenerator(object):
 
-  def __init__(self, database, renamer, template_loader):
+  def __init__(self, database, renamer, metadata, template_loader):
     self._event_classes = set()
     self._database = database
     self._renamer = renamer
+    self._metadata = metadata
     self._template_loader = template_loader
 
   def EmitStreamProviders(self, interface, custom_events,
@@ -235,9 +235,9 @@
       if self._GetEventRedirection(interface, html_name, event_type):
         continue
 
-      annotations = FormatAnnotationsAndComments(
-          GetAnnotationsAndComments(library_name, interface.id,
-                                    annotation_name), '  ')
+      annotations = self._metadata.FormatMetadata(
+          self._metadata.GetMetadata(library_name, interface.id,
+              annotation_name, 'on' + dom_name), '  ')
 
       members_emitter.Emit(
           "\n"
@@ -266,9 +266,8 @@
       else:
         provider = html_name + 'Event'
 
-      annotations = FormatAnnotationsAndComments(
-          GetAnnotationsAndComments(library_name, interface.id,
-                                    annotation_name), '  ')
+      annotations = self._metadata.GetFormattedMetadata(
+          library_name, interface.id, annotation_name, '  ')
 
       members_emitter.Emit(
           "\n"
diff --git a/tools/dom/scripts/systemhtml.py b/tools/dom/scripts/systemhtml.py
index d6fa18a..75a4ffe 100644
--- a/tools/dom/scripts/systemhtml.py
+++ b/tools/dom/scripts/systemhtml.py
@@ -426,6 +426,7 @@
     self._backend = backend
     self._interface_type_info = self._type_registry.TypeInfo(self._interface.id)
     self._library_name = self._renamer.GetLibraryName(self._interface)
+    self._metadata = options.metadata
 
   def Generate(self):
     if IsCustomType(self._interface.id):
@@ -518,9 +519,8 @@
     if implements:
       implements_str = ' implements ' + ', '.join(set(implements))
 
-    annotations = FormatAnnotationsAndComments(
-        GetAnnotationsAndComments(self._library_name,
-                                  self._interface.doc_js_name), '')
+    annotations = self._metadata.GetFormattedMetadata(
+        self._library_name, self._interface.doc_js_name, '')
 
     class_modifiers = ''
     if self._renamer.ShouldSuppressInterface(self._interface):
@@ -589,6 +589,7 @@
     self._template_loader = options.templates
     self._type_registry = options.type_registry
     self._renamer = options.renamer
+    self._metadata = options.metadata
     self._interface_type_info = self._type_registry.TypeInfo(self._interface.id)
     self._current_secondary_parent = None
     self._library_name = self._renamer.GetLibraryName(self._interface)
@@ -773,14 +774,14 @@
 
     output_type = self.SecureOutputType(attribute.type.id)
     input_type = self._NarrowInputType(attribute.type.id)
-    annotations = self._Annotations(attribute.type.id, attribute.id)
+    metadata = self._Metadata(attribute.type.id, attribute.id)
     rename = self._RenamingAnnotation(attribute.id, html_name)
     if not read_only:
       self._members_emitter.Emit(
-          '\n  $RENAME$ANNOTATIONS$TYPE $NAME;'
+          '\n  $RENAME$METADATA$TYPE $NAME;'
           '\n',
           RENAME=rename,
-          ANNOTATIONS=annotations,
+          METADATA=metadata,
           NAME=html_name,
           TYPE=output_type)
     else:
@@ -793,7 +794,7 @@
       self._members_emitter.Emit(
           template,
           RENAME=rename,
-          ANNOTATIONS=annotations,
+          ANNOTATIONS=metadata,
           NAME=html_name,
           TYPE=output_type)
 
@@ -844,9 +845,9 @@
     self._members_emitter.Emit(
         '\n  $RETURN_TYPE get $HTML_NAME => $CONVERT(this._get_$(HTML_NAME));'
         "\n  @JSName('$NAME')"
-        '\n  $(ANNOTATIONS)final $NATIVE_TYPE _get_$HTML_NAME;'
+        '\n  $(METADATA)final $NATIVE_TYPE _get_$HTML_NAME;'
         '\n',
-        ANNOTATIONS=self._Annotations(attr.type.id, html_name),
+        METADATA=self._Metadata(attr.type.id, html_name),
         CONVERT=conversion.function_name,
         HTML_NAME=html_name,
         NAME=attr.id,
@@ -893,9 +894,9 @@
   def _AddDirectNativeOperation(self, info, html_name):
     self._members_emitter.Emit(
         '\n'
-        '  $RENAME$ANNOTATIONS$MODIFIERS$TYPE $NAME($PARAMS) native;\n',
+        '  $RENAME$METADATA$MODIFIERS$TYPE $NAME($PARAMS) native;\n',
         RENAME=self._RenamingAnnotation(info.declared_name, html_name),
-        ANNOTATIONS=self._Annotations(info.type_name, info.declared_name),
+        METADATA=self._Metadata(info.type_name, info.declared_name),
         MODIFIERS='static ' if info.IsStatic() else '',
         TYPE=self.SecureOutputType(info.type_name),
         NAME=html_name,
@@ -975,16 +976,16 @@
       call_emitter.Emit(call)
 
       self._members_emitter.Emit(
-          '  $RENAME$ANNOTATIONS$MODIFIERS$TYPE$TARGET($PARAMS) native;\n',
+          '  $RENAME$METADATA$MODIFIERS$TYPE$TARGET($PARAMS) native;\n',
           RENAME=self._RenamingAnnotation(info.declared_name, target),
-          ANNOTATIONS=self._Annotations(info.type_name, info.declared_name),
+          METADATA=self._Metadata(info.type_name, info.declared_name),
           MODIFIERS='static ' if info.IsStatic() else '',
           TYPE=TypeOrNothing(native_return_type),
           TARGET=target,
           PARAMS=', '.join(target_parameters))
 
     declaration = '%s%s%s %s(%s)' % (
-        self._Annotations(info.type_name, info.declared_name),
+        self._Metadata(info.type_name, info.declared_name),
         'static ' if info.IsStatic() else '',
         return_type,
         html_name,
@@ -1032,13 +1033,12 @@
       return  "@JSName('%s')\n  " % idl_name
     return ''
 
-  def _Annotations(self, idl_type, idl_member_name, indent='  '):
-    anns = FindDart2JSAnnotationsAndComments(idl_type, self._library_name,
-                                             self._interface.id,
-                                             idl_member_name)
+  def _Metadata(self, idl_type, idl_member_name, indent='  '):
+    anns = self._metadata.GetDart2JSMetadata(
+        idl_type, self._library_name, self._interface.id, idl_member_name)
 
-    if not AnyConversionAnnotations(idl_type, self._interface.id,
-                                  idl_member_name):
+    if not self._metadata.AnyConversionAnnotations(
+        idl_type, self._interface.id, idl_member_name):
       return_type = self.SecureOutputType(idl_type)
       native_type = self._NarrowToImplementationType(idl_type)
       if native_type != return_type:
@@ -1046,7 +1046,7 @@
           "@Returns('%s')" % native_type,
           "@Creates('%s')" % native_type,
         ]
-    return FormatAnnotationsAndComments(anns, indent);
+    return self._metadata.FormatMetadata(anns, indent);
 
   def CustomJSMembers(self):
     return _js_custom_members
diff --git a/tools/dom/scripts/systemnative.py b/tools/dom/scripts/systemnative.py
index fc27037..130c933 100644
--- a/tools/dom/scripts/systemnative.py
+++ b/tools/dom/scripts/systemnative.py
@@ -25,6 +25,7 @@
     self._template_loader = options.templates
     self._type_registry = options.type_registry
     self._interface_type_info = self._type_registry.TypeInfo(self._interface.id)
+    self._metadata = options.metadata
 
   def ImplementsMergedMembers(self):
     # We could not add merged functions to implementation class because
@@ -520,7 +521,7 @@
           overload_name, argument_list)
       cpp_callback_name = self._GenerateNativeBinding(
           overload_name, (0 if operation.is_static else 1) + argument_count,
-          dart_declaration, 'Callback', False)
+          dart_declaration, 'Callback', False, False)
       self._GenerateOperationNativeCallback(operation, operation.arguments[:argument_count], cpp_callback_name)
 
     self._GenerateDispatcherBody(
@@ -817,18 +818,19 @@
         TO_DART_CONVERSION=to_dart_conversion)
 
   def _GenerateNativeBinding(self, idl_name, argument_count, dart_declaration,
-      native_suffix, is_custom):
-    annotations = FormatAnnotationsAndComments(
-        GetAnnotationsAndComments(self._renamer.GetLibraryName(self._interface),
-                                  self._interface.id, idl_name),
-                                  '  ')
+      native_suffix, is_custom, emit_metadata=True):
+    metadata = []
+    if emit_metadata:
+      metadata = self._metadata.GetFormattedMetadata(
+          self._renamer.GetLibraryName(self._interface),
+          self._interface.id, idl_name, '  ')
 
     native_binding = '%s_%s_%s' % (self._interface.id, idl_name, native_suffix)
     self._members_emitter.Emit(
         '\n'
-        '  $ANNOTATIONS$DART_DECLARATION native "$NATIVE_BINDING";\n',
+        '  $METADATA$DART_DECLARATION native "$NATIVE_BINDING";\n',
         DOMINTERFACE=self._interface.id,
-        ANNOTATIONS=annotations,
+        METADATA=metadata,
         DART_DECLARATION=dart_declaration,
         NATIVE_BINDING=native_binding)