Converted Observatory top-nav-menu element

runtime/observatory/lib/elements.dart

Index: runtime/observatory/lib/elements.dart
diff --git a/runtime/observatory/lib/elements.dart b/runtime/observatory/lib/elements.dart
index 57f9f8627195a2b808719a927fbce1c0e63b5ad4..126eb914adf9e55625bb69b5a42b56090c721c08 100644
--- a/runtime/observatory/lib/elements.dart
+++ b/runtime/observatory/lib/elements.dart
@@ -67,6 +67,8 @@ import 'package:observatory/src/elements/nav/menu_item.dart';
 import 'package:observatory/src/elements/nav/menu_item_wrapper.dart';
 import 'package:observatory/src/elements/nav/refresh.dart';
 import 'package:observatory/src/elements/nav/refresh_wrapper.dart';
+import 'package:observatory/src/elements/nav/top_menu.dart';
+import 'package:observatory/src/elements/nav/top_menu_wrapper.dart';
 import 'package:observatory/src/elements/view_footer.dart';
 
 export 'package:observatory/src/elements/helpers/rendering_queue.dart';
@@ -74,6 +76,7 @@ export 'package:observatory/src/elements/helpers/rendering_queue.dart';
 export 'package:observatory/src/elements/nav/menu.dart';
 export 'package:observatory/src/elements/nav/menu_item.dart';
 export 'package:observatory/src/elements/nav/refresh.dart';
+export 'package:observatory/src/elements/nav/top_menu.dart';
 export 'package:observatory/src/elements/view_footer.dart';
 
 // Even though this function does not invoke any asynchronous operation
@@ -85,5 +88,7 @@ Future initElements() async {
   NavMenuItemElementWrapper.tag.ensureRegistration();
   NavRefreshElement.tag.ensureRegistration();
   NavRefreshElementWrapper.tag.ensureRegistration();
+  NavTopMenuElement.tag.ensureRegistration();
+  NavTopMenuElementWrapper.tag.ensureRegistration();
   ViewFooterElement.tag.ensureRegistration();
 }