Improve display of simd vector types and stack traces in Observatory.

runtime/observatory/lib/src/service/object.dart

 // Copyright (c) 2014, 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.
 
 part of service;
 
 /// Helper function for canceling a Future<StreamSubscription>.
 Future cancelFutureSubscription(
     Future<StreamSubscription> subscriptionFuture) async {
   if (subscriptionFuture != null) {
@@ skipping 118 matching lines @@
   bool get isDouble => false;
   bool get isString => false;
   bool get isInt => false;
   bool get isList => false;
   bool get isMap => false;
   bool get isTypedData => false;
   bool get isRegExp => false;
   bool get isMirrorReference => false;
   bool get isWeakProperty => false;
   bool get isClosure => false;
+  bool get isStackTrace => false;
+  bool get isSimdValue => false;
   bool get isPlainInstance => false;
 
   /// Has this object been fully loaded?
   bool get loaded => _loaded;
   bool _loaded = false;
   // TODO(turnidge): Make loaded observable and get rid of loading
   // from Isolate.
 
   /// Is this object cacheable?  That is, is it impossible for the [id]
   /// of this object to change?
@@ skipping 2057 matching lines @@
         || kind == 'Int8List'
         || kind == 'Int16List'
         || kind == 'Int32List'
         || kind == 'Int64List'
         || kind == 'Float32List'
         || kind == 'Float64List'
         || kind == 'Int32x4List'
         || kind == 'Float32x4List'
         || kind == 'Float64x2List';
   }
+  bool get isSimdValue {
+    return kind == 'Float32x4'
+        || kind == 'Float64x2'
+        || kind == 'Int32x4';
+  }
   bool get isRegExp => kind == 'RegExp';
   bool get isMirrorReference => kind == 'MirrorReference';
   bool get isWeakProperty => kind == 'WeakProperty';
   bool get isClosure => kind == 'Closure';
+  bool get isStackTrace => kind == 'StackTrace';
 
   // TODO(turnidge): Is this properly backwards compatible when new
   // instance kinds are added?
   bool get isPlainInstance => kind == 'PlainInstance';
 
   Instance._empty(ServiceObjectOwner owner) : super._empty(owner);
 
   void _update(ObservableMap map, bool mapIsRef) {
     // Extract full properties.
     _upgradeCollection(map, isolate);
@@ skipping 1570 matching lines @@
     var v = list[i];
     if ((v is ObservableMap) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is ObservableList) {
       _upgradeObservableList(v, owner);
     } else if (v is ObservableMap) {
       _upgradeObservableMap(v, owner);
     }
   }
 }