Revert 28422

runtime/bin/vmservice/client/packages/observatory/src/observatory_elements/message_viewer.dart

Index: runtime/bin/vmservice/client/packages/observatory/src/observatory_elements/message_viewer.dart
diff --git a/runtime/bin/vmservice/client/packages/observatory/src/observatory_elements/message_viewer.dart b/runtime/bin/vmservice/client/packages/observatory/src/observatory_elements/message_viewer.dart
deleted file mode 100644
index 8dfa43e4ba7528b8baca973d5815d4dbd8a08d6a..0000000000000000000000000000000000000000
--- a/runtime/bin/vmservice/client/packages/observatory/src/observatory_elements/message_viewer.dart
+++ /dev/null
@@ -1,34 +0,0 @@
-// 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:polymer/polymer.dart';
-import 'observatory_element.dart';
-
-@CustomTag('message-viewer')
-class MessageViewerElement extends ObservatoryElement {
-  Map _message;
-  @published Map get message => _message;
-
-  @published set message(Map m) {
-    _message = m;
-    notifyProperty(this, #messageType);
-    notifyProperty(this, #members);
-  }
-
-  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'];
-  }
-}