Removed polymer & mirror from Observatory

runtime/observatory/lib/src/elements/class_tree.dart

Index: runtime/observatory/lib/src/elements/class_tree.dart
diff --git a/runtime/observatory/lib/src/elements/class_tree.dart b/runtime/observatory/lib/src/elements/class_tree.dart
index 0e2aed056550790fefd6b0c38daa0d5513af941a..ea4bdd688319b65645d683bd4aa0c58488b6ff53 100644
--- a/runtime/observatory/lib/src/elements/class_tree.dart
+++ b/runtime/observatory/lib/src/elements/class_tree.dart
@@ -9,12 +9,12 @@ 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/bar.dart';
 import 'package:observatory/src/elements/nav/isolate_menu.dart';
-import 'package:observatory/src/elements/nav/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';
@@ -23,9 +23,7 @@ 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,
-                                          NavBarElement.tag,
                                           NavIsolateMenuElement.tag,
-                                          NavMenuElement.tag,
                                           NavNotifyElement.tag,
                                           NavTopMenuElement.tag,
                                           NavVMMenuElement.tag,
@@ -84,15 +82,13 @@ class ClassTreeElement extends HtmlElement implements Renderable{
 
   void render() {
     children = [
-      new NavBarElement(queue: _r.queue)
-        ..children = [
-          new NavTopMenuElement(queue: _r.queue),
-          new NavVMMenuElement(_vm, _events, queue: _r.queue),
-          new NavIsolateMenuElement(_isolate, _events, queue: _r.queue),
-          new NavMenuElement('class hierarchy', link: Uris.classTree(_isolate),
-                             last: true, queue: _r.queue),
-          new NavNotifyElement(_notifications, queue: _r.queue)
-        ],
+      navBar([
+        new NavTopMenuElement(queue: _r.queue),
+        new NavVMMenuElement(_vm, _events, queue: _r.queue),
+        new NavIsolateMenuElement(_isolate, _events, queue: _r.queue),
+        navMenu('class hierarchy'),
+        new NavNotifyElement(_notifications, queue: _r.queue)
+      ]),
       new DivElement()
         ..classes = ['content-centered']
         ..children = [