Fix heap report bug and add checked mode display to VM page

runtime/bin/vmservice/client/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;
 
 /// A [ServiceObject] is an object known to the VM service and is tied
 /// to an owning [Isolate].
 abstract class ServiceObject extends Observable {
   /// The owner of this [ServiceObject].  This can be an [Isolate], a
@@ skipping 159 matching lines @@
   @reflectable VM get vm => this;
   @reflectable Isolate get isolate => null;
 
   @reflectable Iterable<Isolate> get isolates => _isolateCache.values;
 
   @reflectable String get link => '$id';
 
   @observable String version = 'unknown';
   @observable String architecture = 'unknown';
   @observable double uptime = 0.0;
+  @observable bool assertsEnabled = false;
+  @observable bool typeChecksEnabled = false;
 
   VM() : super._empty(null) {
     name = 'vm';
     vmName = 'vm';
     _cache['vm'] = this;
     update(toObservable({'id':'vm', 'type':'@VM'}));
   }
 
   final StreamController<ServiceException> exceptions =
       new StreamController.broadcast();
@@ skipping 142 matching lines @@
   Future<String> getString(String id);
 
   void _update(ObservableMap map, bool mapIsRef) {
     if (mapIsRef) {
       return;
     }
     _loaded = true;
     version = map['version'];
     architecture = map['architecture'];
     uptime = map['uptime'];
+    assertsEnabled = map['assertsEnabled'];
+    typeChecksEnabled = map['typeChecksEnabled'];
     _updateIsolates(map['isolates']);
   }
 
   void _updateIsolates(List newIsolates) {
     var oldIsolateCache = _isolateCache;
     var newIsolateCache = new Map<String,Isolate>();
     for (var isolateMap in newIsolates) {
       var isolateId = isolateMap['id'];
       var isolate = oldIsolateCache[isolateId];
       if (isolate != null) {
@@ skipping 898 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);
     }
   }
 }