Removed polymer & mirror from Observatory

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

Index: runtime/observatory/lib/src/elements/megamorphiccache_view.dart
diff --git a/runtime/observatory/lib/src/elements/megamorphiccache_view.dart b/runtime/observatory/lib/src/elements/megamorphiccache_view.dart
index d14e7c783a0d2e7a120ddfdd1baf7a189af0512b..7e21e5b384443c4cfcc6edaa0d12c01799be4ab2 100644
--- a/runtime/observatory/lib/src/elements/megamorphiccache_view.dart
+++ b/runtime/observatory/lib/src/elements/megamorphiccache_view.dart
@@ -10,11 +10,11 @@ import 'package:observatory/models.dart' as M;
 import 'package:observatory/src/elements/context_ref.dart';
 import 'package:observatory/src/elements/curly_block.dart';
 import 'package:observatory/src/elements/helpers/any_ref.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/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/refresh.dart';
 import 'package:observatory/src/elements/nav/top_menu.dart';
@@ -28,11 +28,9 @@ class MegamorphicCacheViewElement extends HtmlElement implements Renderable {
                                                 dependencies: const [
                                                   ContextRefElement.tag,
                                                   CurlyBlockElement.tag,
-                                                  NavBarElement.tag,
                                                   NavTopMenuElement.tag,
                                                   NavVMMenuElement.tag,
                                                   NavIsolateMenuElement.tag,
-                                                  NavMenuElement.tag,
                                                   NavRefreshElement.tag,
                                                   NavNotifyElement.tag,
                                                   ObjectCommonElement.tag,
@@ -117,12 +115,11 @@ class MegamorphicCacheViewElement extends HtmlElement implements Renderable {
 
   void render() {
     children = [
-      new NavBarElement(queue: _r.queue)
-        ..children = [
+      navBar([
           new NavTopMenuElement(queue: _r.queue),
           new NavVMMenuElement(_vm, _events, queue: _r.queue),
           new NavIsolateMenuElement(_isolate, _events, queue: _r.queue),
-          new NavMenuElement('object', last: true, queue: _r.queue),
+          navMenu('object'),
           new NavRefreshElement(queue: _r.queue)
               ..onRefresh.listen((e) async {
                 e.element.disabled = true;
@@ -130,7 +127,7 @@ class MegamorphicCacheViewElement extends HtmlElement implements Renderable {
                 _r.dirty();
               }),
           new NavNotifyElement(_notifications, queue: _r.queue)
-        ],
+        ]),
       new DivElement()..classes = ['content-centered-big']
         ..children = [
           new HeadingElement.h2()..text = 'Megamorphic Cache',