Added missing content to nav-top-menu

runtime/observatory/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 'dart:html';
 import 'dart:async';
 import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/class_ref.dart';
 import 'package:observatory/src/elements/containers/virtual_tree.dart';
 import 'package:observatory/src/elements/helpers/nav_bar.dart';
 import 'package:observatory/src/elements/helpers/nav_menu.dart';
 import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
 import 'package:observatory/src/elements/helpers/tag.dart';
-import 'package:observatory/src/elements/helpers/uris.dart';
 import 'package:observatory/src/elements/nav/isolate_menu.dart';
 import 'package:observatory/src/elements/nav/notify.dart';
 import 'package:observatory/src/elements/nav/top_menu.dart';
 import 'package:observatory/src/elements/nav/vm_menu.dart';
 
 
 class ClassTreeElement extends HtmlElement implements Renderable{
   static const tag = const Tag<ClassTreeElement>('class-tree',
                      dependencies: const [ClassRefElement.tag,
                                           NavIsolateMenuElement.tag,
@@ skipping 145 matching lines @@
           : new ClassRefElement(_isolate, type.typeClass, queue: _r.queue)
     ]).toList();
     children.first.text = ' with ';
     return children;
   }
 
   Iterable<M.Class> _children(M.Class cls) {
     return _subclasses[cls.id];
   }
 }