Added methods to surface number of zone and scoped handles for each isolate.

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;
 
 // Some value smaller than the object ring, so requesting a large array
 // doesn't result in an expired ref because the elements lapped it in the
 // object ring.
 const int kDefaultFieldLimit = 100;
@@ skipping 1489 matching lines @@
   String fileAndLine;
 
   DartError error;
   StreamController _snapshotFetch;
 
   List<ByteData> _chunksInProgress;
 
   List<Thread> get threads => _threads;
   final List<Thread> _threads = new List<Thread>();
 
+  int get numZoneHandles => _numZoneHandles;
+  int _numZoneHandles;
+
+  int get numScopedHandles => _numScopedHandles;
+  int _numScopedHandles;
+
   void _loadHeapSnapshot(ServiceEvent event) {
     if (_snapshotFetch == null || _snapshotFetch.isClosed) {
       // No outstanding snapshot request. Presumably another client asked for a
       // snapshot.
       Logger.root.info("Dropping unsolicited heap snapshot chunk");
       return;
     }
 
     // Occasionally these actually arrive out of order.
     var chunkIndex = event.chunkIndex;
@@ skipping 105 matching lines @@
     if (savedStartTime == null) {
       vm._buildIsolateList();
     }
 
     extensionRPCs.clear();
     if (map['extensionRPCs'] != null) {
       extensionRPCs.addAll(map['extensionRPCs']);
     }
 
     threads.clear();
-    if(map['threads'] != null) {
+    if (map['threads'] != null) {
       threads.addAll(map['threads']);
     }
+
+    _numZoneHandles = map['_numZoneHandles'];
+    _numScopedHandles = map['_numScopedHandles'];
   }
 
   Future<TagProfile> updateTagProfile() {
     return isolate.invokeRpcNoUpgrade('_getTagProfile', {}).then((Map map) {
       var seconds = new DateTime.now().millisecondsSinceEpoch / 1000.0;
       tagProfile._processTagProfile(seconds, map);
       return tagProfile;
     });
   }
 
@@ skipping 2843 matching lines @@
     var v = list[i];
     if ((v is Map) && _isServiceMap(v)) {
       list[i] = owner.getFromMap(v);
     } else if (v is List) {
       _upgradeList(v, owner);
     } else if (v is Map) {
       _upgradeMap(v, owner);
     }
   }
 }