Observatory frontend changes for Dartium DevTools.

runtime/bin/vmservice/client/lib/src/observatory/application.dart

 // Copyright (c) 2013, 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 observatory;
 
 /// The observatory application. Instances of this are created and owned
 /// by the observatory_application custom element.
 class ObservatoryApplication extends Observable {
   @observable final LocationManager locationManager;
   @observable final RequestManager requestManager;
   @observable final IsolateManager isolateManager;
 
-  ObservatoryApplication() :
-      locationManager = new LocationManager(),
-      requestManager = new HttpRequestManager(),
-      isolateManager = new IsolateManager() {
+  void _setup() {
     locationManager._application = this;
     requestManager._application = this;
     isolateManager._application = this;
     requestManager.interceptor = isolateManager._responseInterceptor;
     locationManager.init();
   }
 
+  ObservatoryApplication.devtools() :
+      locationManager = new LocationManager(),
+      requestManager = new PostMessageRequestManager(),
+      isolateManager = new IsolateManager() {
+    _setup();
+  }
+
+  ObservatoryApplication() :
+      locationManager = new LocationManager(),
+      requestManager = new HttpRequestManager(),
+      isolateManager = new IsolateManager() {
+    _setup();
+  }
+
   /// Return the [Isolate] with [id].
   Isolate getIsolate(int id) {
     return isolateManager.isolates[id];
   }
 
   /// Return the name of the isolate with [id].
   String getIsolateName(int id) {
     var isolate = getIsolate(id);
     if (isolate == null) {
       return 'Null Isolate';
     }
     return isolate.name;
   }
 }