Improve isolate list. Expose isolate origin.

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 1091 matching lines @@
     return result;
   }
 }
 
 /// State for a running isolate.
 class Isolate extends ServiceObjectOwner with Coverage {
   static const kLoggingStream = '_Logging';
   @reflectable VM get vm => owner;
   @reflectable Isolate get isolate => this;
   @observable int number;
+  @observable int originNumber;
   @observable DateTime startTime;
   @observable Duration get upTime =>
       (new DateTime.now().difference(startTime));
 
   @observable ObservableMap counters = new ObservableMap();
 
   void _updateRunState() {
     topFrame = (pauseEvent != null ? pauseEvent.topFrame : null);
     paused = (pauseEvent != null &&
               pauseEvent.kind != ServiceEvent.kResume);
@@ skipping 220 matching lines @@
     name = map['name'];
     vmName = map['name'];
     number = int.parse(map['number'], onError:(_) => null);
     if (mapIsRef) {
       return;
     }
     _loaded = true;
     loading = false;
 
     _upgradeCollection(map, isolate);
+    originNumber = int.parse(map['_originNumber'], onError:(_) => null);
     rootLibrary = map['rootLib'];
     if (map['entry'] != null) {
       entry = map['entry'];
     }
     var savedStartTime = startTime;
     int startTimeInMillis = map['startTime'];
     startTime = new DateTime.fromMillisecondsSinceEpoch(startTimeInMillis);
     notifyPropertyChange(#upTime, 0, 1);
     var countersMap = map['_tagCounters'];
     if (countersMap != null) {
@@ skipping 2577 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);
     }
   }
 }