Support vm_service 6.2.0 (#1298)

diff --git a/dwds/CHANGELOG.md b/dwds/CHANGELOG.md
index cc59c5d..f0d01bc 100644
--- a/dwds/CHANGELOG.md
+++ b/dwds/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## 10.0.2-dev
 
+- Support `vm_service` version `6.2.0`.
 - Fix missing sdk libraries in `getObject()` calls.
 - Fix incorrect `rootLib` returned by `ChromeProxyService`.
 
diff --git a/dwds/lib/src/debugging/classes.dart b/dwds/lib/src/debugging/classes.dart
index 71557b0..c8ee5cb 100644
--- a/dwds/lib/src/debugging/classes.dart
+++ b/dwds/lib/src/debugging/classes.dart
@@ -159,6 +159,7 @@
           name: name,
           owner: classRef,
           declaredType: InstanceRef(
+              identityHashCode: createId().hashCode,
               id: createId(),
               kind: InstanceKind.kType,
               classRef: classMetaData.classRef),
diff --git a/dwds/lib/src/debugging/instance.dart b/dwds/lib/src/debugging/instance.dart
index 3bb5268..c7bf045 100644
--- a/dwds/lib/src/debugging/instance.dart
+++ b/dwds/lib/src/debugging/instance.dart
@@ -31,7 +31,10 @@
       String kind, RemoteObject remoteObject) {
     var classRef = classRefFor('dart:core', kind);
     return InstanceRef(
-        kind: kind, classRef: classRef, id: dartIdFor(remoteObject?.value))
+        identityHashCode: dartIdFor(remoteObject?.value).hashCode,
+        kind: kind,
+        classRef: classRef,
+        id: dartIdFor(remoteObject?.value))
       ..valueAsString = '${remoteObject?.value}';
   }
 
@@ -39,6 +42,7 @@
   Instance _primitiveInstance(String kind, RemoteObject remote) {
     if (remote?.objectId == null) return null;
     return Instance(
+        identityHashCode: remote.objectId.hashCode,
         id: remote.objectId,
         kind: kind,
         classRef: classRefFor('dart:core', kind))
@@ -59,7 +63,10 @@
       preview = fullString.substring(start, end);
     }
     return Instance(
-        kind: InstanceKind.kString, classRef: classRefForString, id: createId())
+        identityHashCode: createId().hashCode,
+        kind: InstanceKind.kString,
+        classRef: classRefForString,
+        id: createId())
       ..valueAsString = preview
       ..valueAsStringIsTruncated = truncated
       ..length = fullString.length
@@ -71,6 +78,7 @@
     var result = Instance(
         kind: InstanceKind.kClosure,
         id: remoteObject.objectId,
+        identityHashCode: remoteObject.objectId.hashCode,
         classRef: classRefForClosure);
     return result;
   }
@@ -144,6 +152,7 @@
           declaredType: InstanceRef(
               kind: InstanceKind.kType,
               classRef: instance.classRef,
+              identityHashCode: createId().hashCode,
               id: createId()),
           owner: classRef,
           // TODO(grouma) - Fill these in.
@@ -167,6 +176,7 @@
     var result = Instance(
         kind: InstanceKind.kPlainInstance,
         id: remoteObject.objectId,
+        identityHashCode: remoteObject.objectId.hashCode,
         classRef: classRef)
       ..fields = fields;
     return result;
@@ -218,7 +228,10 @@
         ? associations.length
         : (await instanceRefFor(remoteObject)).length;
     return Instance(
-        kind: InstanceKind.kMap, id: remoteObject.objectId, classRef: classRef)
+        identityHashCode: remoteObject.objectId.hashCode,
+        kind: InstanceKind.kMap,
+        id: remoteObject.objectId,
+        classRef: classRef)
       ..length = length
       ..offset = offset
       ..count = (associations.length == length) ? null : associations.length
@@ -242,7 +255,10 @@
     var fields = await Future.wait(indexed
         .map((property) async => await _instanceRefForRemote(property.value)));
     return Instance(
-        kind: InstanceKind.kList, id: remoteObject.objectId, classRef: classRef)
+        identityHashCode: remoteObject.objectId.hashCode,
+        kind: InstanceKind.kList,
+        id: remoteObject.objectId,
+        classRef: classRef)
       ..length = length
       ..elements = fields
       ..offset = offset
@@ -333,6 +349,7 @@
         // TODO(#777): dartIdFor() will return an ID containing the entire
         // string, even if we're truncating the string value here.
         return InstanceRef(
+            identityHashCode: dartIdFor(remoteObject.value).hashCode,
             id: dartIdFor(remoteObject.value),
             classRef: classRefForString,
             kind: InstanceKind.kString)
@@ -355,6 +372,7 @@
           return InstanceRef(
               kind: InstanceKind.kList,
               id: remoteObject.objectId,
+              identityHashCode: remoteObject.objectId.hashCode,
               classRef: metaData.classRef)
             ..length = metaData.length;
         }
@@ -362,12 +380,14 @@
           return InstanceRef(
               kind: InstanceKind.kMap,
               id: remoteObject.objectId,
+              identityHashCode: remoteObject.objectId.hashCode,
               classRef: metaData.classRef)
             ..length = metaData.length;
         }
         return InstanceRef(
             kind: InstanceKind.kPlainInstance,
             id: remoteObject.objectId,
+            identityHashCode: remoteObject.objectId.hashCode,
             classRef: metaData.classRef);
       case 'function':
         var functionMetaData = await FunctionMetaData.metaDataFor(
@@ -375,6 +395,7 @@
         return InstanceRef(
             kind: InstanceKind.kClosure,
             id: remoteObject.objectId,
+            identityHashCode: remoteObject.objectId.hashCode,
             classRef: classRefForClosure)
           // TODO(grouma) - fill this in properly.
           ..closureFunction = FuncRef(
diff --git a/dwds/lib/src/injected/client.js b/dwds/lib/src/injected/client.js
index c7415d2..4019a15 100644
--- a/dwds/lib/src/injected/client.js
+++ b/dwds/lib/src/injected/client.js
@@ -1,4 +1,8 @@
+<<<<<<< HEAD
+// Generated by dart2js (fast startup emitter, strong), the Dart to JavaScript compiler version: 2.13.0-203.0.dev.
+=======
 // Generated by dart2js (fast startup emitter, strong), the Dart to JavaScript compiler version: 2.13.0-165.0.dev.
+>>>>>>> master
 // The code supports the following hooks:
 // dartPrint(message):
 //    if this function is defined it is called instead of the Dart [print]
@@ -15249,7 +15253,7 @@
   P.Iterator.prototype = {};
   P.Null.prototype = {
     get$hashCode: function(_) {
-      return P.Object.prototype.get$hashCode.call(C.JSNull_methods, this);
+      return P.Object.prototype.get$hashCode.call(this, this);
     },
     toString$0: function(_) {
       return "null";
@@ -23373,7 +23377,7 @@
     leafTags: null,
     arrayRti: typeof Symbol == "function" && typeof Symbol() == "symbol" ? Symbol("$ti") : "$ti"
   };
-  H._Universe_addRules(init.typeUniverse, JSON.parse('{"Promise":"JavaScriptObject","RequireLoader":"JavaScriptObject","JsError":"JavaScriptObject","JsMap":"JavaScriptObject","PlainJavaScriptObject":"JavaScriptObject","UnknownJavaScriptObject":"JavaScriptObject","JavaScriptFunction":"JavaScriptObject","AbortPaymentEvent":"Event","ExtendableEvent":"Event","AudioContext":"BaseAudioContext","AbsoluteOrientationSensor":"EventTarget","OrientationSensor":"EventTarget","Sensor":"EventTarget","AElement":"SvgElement","GraphicsElement":"SvgElement","_ResourceProgressEvent":"ProgressEvent","AudioElement":"HtmlElement","MediaElement":"HtmlElement","ShadowRoot":"Node","DocumentFragment":"Node","XmlDocument":"Document","VttCue":"TextTrackCue","CompositionEvent":"UIEvent","DedicatedWorkerGlobalScope":"WorkerGlobalScope","CDataSection":"CharacterData","Text":"CharacterData","HttpRequestUpload":"HttpRequestEventTarget","HtmlFormControlsCollection":"HtmlCollection","CssCharsetRule":"CssRule","CssStyleSheet":"StyleSheet","JSBool":{"bool":[]},"JSNull":{"Null":[]},"JavaScriptObject":{"Function":[],"Promise":["1&"],"JsError":[]},"JSArray":{"List":["1"],"EfficientLengthIterable":["1"],"Iterable":["1"]},"JSUnmodifiableArray":{"JSArray":["1"],"List":["1"],"EfficientLengthIterable":["1"],"Iterable":["1"]},"ArrayIterator":{"Iterator":["1"]},"JSNumber":{"double":[],"num":[],"Comparable":["num"]},"JSInt":{"double":[],"int":[],"num":[],"Comparable":["num"]},"JSNumNotInt":{"double":[],"num":[],"Comparable":["num"]},"JSString":{"String":[],"Comparable":["String"],"Pattern":[]},"_CastIterableBase":{"Iterable":["2"]},"CastIterator":{"Iterator":["2"]},"CastIterable":{"_CastIterableBase":["1","2"],"Iterable":["2"],"Iterable.E":"2"},"_EfficientLengthCastIterable":{"CastIterable":["1","2"],"_CastIterableBase":["1","2"],"EfficientLengthIterable":["2"],"Iterable":["2"],"Iterable.E":"2"},"_CastListBase":{"ListMixin":["2"],"List":["2"],"_CastIterableBase":["1","2"],"EfficientLengthIterable":["2"],"Iterable":["2"]},"CastList":{"_CastListBase":["1","2"],"ListMixin":["2"],"List":["2"],"_CastIterableBase":["1","2"],"EfficientLengthIterable":["2"],"Iterable":["2"],"ListMixin.E":"2","Iterable.E":"2"},"CastMap":{"MapMixin":["3","4"],"Map":["3","4"],"MapMixin.K":"3","MapMixin.V":"4"},"LateError":{"Error":[]},"ReachabilityError":{"Error":[]},"NotNullableError":{"Error":[]},"EfficientLengthIterable":{"Iterable":["1"]},"ListIterable":{"EfficientLengthIterable":["1"],"Iterable":["1"]},"SubListIterable":{"ListIterable":["1"],"EfficientLengthIterable":["1"],"Iterable":["1"],"ListIterable.E":"1","Iterable.E":"1"},"ListIterator":{"Iterator":["1"]},"MappedIterable":{"Iterable":["2"],"Iterable.E":"2"},"EfficientLengthMappedIterable":{"MappedIterable":["1","2"],"EfficientLengthIterable":["2"],"Iterable":["2"],"Iterable.E":"2"},"MappedIterator":{"Iterator":["2"]},"MappedListIterable":{"ListIterable":["2"],"EfficientLengthIterable":["2"],"Iterable":["2"],"ListIterable.E":"2","Iterable.E":"2"},"WhereIterable":{"Iterable":["1"],"Iterable.E":"1"},"WhereIterator":{"Iterator":["1"]},"SkipIterable":{"Iterable":["1"],"Iterable.E":"1"},"EfficientLengthSkipIterable":{"SkipIterable":["1"],"EfficientLengthIterable":["1"],"Iterable":["1"],"Iterable.E":"1"},"SkipIterator":{"Iterator":["1"]},"EmptyIterable":{"EfficientLengthIterable":["1"],"Iterable":["1"],"Iterable.E":"1"},"EmptyIterator":{"Iterator":["1"]},"UnmodifiableListBase":{"ListMixin":["1"],"UnmodifiableListMixin":["1"],"List":["1"],"EfficientLengthIterable":["1"],"Iterable":["1"]},"ReversedListIterable":{"ListIterable":["1"],"EfficientLengthIterable":["1"],"Iterable":["1"],"ListIterable.E":"1","Iterable.E":"1"},"Symbol":{"Symbol0":[]},"ConstantMapView":{"UnmodifiableMapView":["1","2"],"_UnmodifiableMapView_MapView__UnmodifiableMapMixin":["1","2"],"MapView":["1","2"],"_UnmodifiableMapMixin":["1","2"],"Map":["1","2"]},"ConstantMap":{"Map":["1","2"]},"ConstantStringMap":{"ConstantMap":["1","2"],"Map":["1","2"]},"_ConstantMapKeyIterable":{"Iterable":["1"],"Iterable.E":"1"},"JSInvocationMirror":{"Invocation":[]},"NullError":{"Error":[]},"JsNoSuchMethodError":{"Error":[]},"UnknownJsTypeError":{"Error":[]},"_StackTrace":{"StackTrace":[]},"Closure":{"Function":[]},"TearOffClosure":{"Function":[]},"StaticClosure":{"Function":[]},"BoundClosure":{"Function":[]},"RuntimeError":{"Error":[]},"_AssertionError":{"Error":[]},"JsLinkedHashMap":{"MapMixin":["1","2"],"LinkedHashMap":["1","2"],"Map":["1","2"],"MapMixin.K":"1","MapMixin.V":"2"},"LinkedHashMapKeyIterable":{"EfficientLengthIterable":["1"],"Iterable":["1"],"Iterable.E":"1"},"LinkedHashMapKeyIterator":{"Iterator":["1"]},"JSSyntaxRegExp":{"RegExp":[],"Pattern":[]},"NativeByteBuffer":{"ByteBuffer":[]},"NativeTypedData":{"TypedData":[]},"NativeByteData":{"TypedData":[]},"NativeTypedArray":{"JavaScriptIndexingBehavior":["1"],"TypedData":[]},"NativeTypedArrayOfDouble":{"ListMixin":["double"],"JavaScriptIndexingBehavior":["double"],"List":["double"],"EfficientLengthIterable":["double"],"TypedData":[],"Iterable":["double"],"Fixed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   var string$ = {
     _null_: "`null` encountered as the result from expression with type `Never`.",
@@ -23631,7 +23635,6 @@
     C.JSArray_methods = J.JSArray.prototype;
     C.JSBool_methods = J.JSBool.prototype;
     C.JSInt_methods = J.JSInt.prototype;
-    C.JSNull_methods = J.JSNull.prototype;
     C.JSNumber_methods = J.JSNumber.prototype;
     C.JSString_methods = J.JSString.prototype;
     C.JavaScriptFunction_methods = J.JavaScriptFunction.prototype;
diff --git a/dwds/pubspec.yaml b/dwds/pubspec.yaml
index 147a3b9..6b8a7da 100644
--- a/dwds/pubspec.yaml
+++ b/dwds/pubspec.yaml
@@ -35,7 +35,7 @@
   source_maps: ^0.10.0
   sse: ^3.7.0
   # We pin the version because we implement the interface.
-  vm_service: 6.1.0+1
+  vm_service: 6.2.0
   web_socket_channel: ^2.0.0
   webkit_inspection_protocol: ^1.0.0