Timeline service protocol support with Observatory UI

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 816 matching lines @@
 
   Future<ObservableMap> _fetchDirect() async {
     if (!loaded) {
       // The vm service relies on these events to keep the VM and
       // Isolate types up to date.
       try {
         await listenEventStream(kVMStream, _dispatchEventToIsolate);
         await listenEventStream(kIsolateStream, _dispatchEventToIsolate);
         await listenEventStream(kDebugStream, _dispatchEventToIsolate);
         await listenEventStream(_kGraphStream, _dispatchEventToIsolate);
-      } on FakeVMRpcException catch (e) {
-        // ignore FakeVMRpcExceptions here.  
+      } on FakeVMRpcException catch (_) {
+        // ignore FakeVMRpcExceptions here.
       }
     }
     return await invokeRpcNoUpgrade('getVM', {});
   }
 
   Future setName(String newName) {
     return invokeRpc('setVMName', { 'name': newName });
   }
 
   Future<ServiceObject> getFlagList() {
@@ skipping 3149 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);
     }
   }
 }