Refactor Observatory

runtime/bin/vmservice/client/lib/src/elements/message_viewer.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.
 
 library message_viewer_element;
 
 import 'package:logging/logging.dart';
+import 'package:observatory/app.dart';
 import 'package:polymer/polymer.dart';
 import 'observatory_element.dart';
 
 @CustomTag('message-viewer')
 class MessageViewerElement extends ObservatoryElement {
   Map _message;
   @published Map get message => _message;
+  @published ObservatoryApplication app;
 
   @published set message(Map m) {
+    if (m == null) {
+      Logger.root.info('Viewing null message.');
+      return;
+    }
+    Logger.root.info('Viewing message of type \'${m['type']}\'');
     _message = m;
     notifyPropertyChange(#messageType, "", messageType);
-    notifyPropertyChange(#members, [], members);
-    Logger.root.info('Viewing message of type \'${message['type']}\'');
   }
 
   MessageViewerElement.created() : super.created();
 
   String get messageType {
     if (message == null || message['type'] == null) {
       return 'Error';
     }
     return message['type'];
   }
-
-  List<Map> get members {
-    if (message == null || message['members'] == null) {
-      return [];
-    }
-    return message['members'];
-  }
 }