Visual refresh of allocation profile page

runtime/bin/vmservice/client/lib/src/elements/class_tree.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.
 
 library class_tree_element;
 
 import 'observatory_element.dart';
 import 'dart:html';
 import 'package:logging/logging.dart';
 import 'package:observatory/app.dart';
@@ skipping 32 matching lines @@
 
 
 @CustomTag('class-tree')
 class ClassTreeElement extends ObservatoryElement {
   @observable Isolate isolate;
 
   TableTree tree;
 
   ClassTreeElement.created() : super.created();
 
-  void enteredView() {
+  @override
+  void attached() {
+    super.attached();
     tree = new TableTree();
     if (isolate != null) {
       _update(isolate.objectClass);
     }
   }
 
   isolateChanged(oldValue) {
     isolate.getClassHierarchy().then((objectClass) {
       _update(objectClass);
     });
@@ skipping 40 matching lines @@
       try {
         // Subtract 1 to get 0 based indexing.
         tree.toggle(row.rowIndex - 1);
       }  catch (e, stackTrace) {
         Logger.root.warning('toggleExpanded', e, stackTrace);
       }
     }
   }
 
 }