Revert "Use Timer and not AnimationFrame during Observatory UI tests"

runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart

Index: runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart b/runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart
index b61e4ae0b6f54b5dfd1463eb48c8c0413334d08d..64adcfb8087b4c09b913a9684be1bce0c9e18c4a 100644
--- a/runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart
+++ b/runtime/observatory/tests/observatory_ui/nav/notify/element_test.dart
@@ -5,7 +5,6 @@ import 'dart:html' hide Notification, NotificationEvent;
 import 'package:unittest/unittest.dart';
 import 'package:observatory/mocks.dart';
 import 'package:observatory/models.dart' as M;
-import 'package:observatory/src/elements/helpers/rendering_queue.dart';
 import 'package:observatory/src/elements/nav/notify.dart';
 import 'package:observatory/src/elements/nav/notify_event.dart';
 import 'package:observatory/src/elements/nav/notify_exception.dart';
@@ -16,9 +15,6 @@ main() {
   final evTag = NavNotifyEventElement.tag.name;
   final exTag = NavNotifyExceptionElement.tag.name;
 
-  final TimedRenderingBarrier barrier = new TimedRenderingBarrier();
-  final RenderingQueue queue = new RenderingQueue.fromBarrier(barrier);
-
   const vm = const VMRefMock();
   const isolate = const IsolateRefMock(id: 'i-id', name: 'i-name');
 
@@ -45,7 +41,7 @@ main() {
   test('is correctly listening', () async {
     final NotificationRepositoryMock repository =
         new NotificationRepositoryMock();
-    final NavNotifyElement e = new NavNotifyElement(repository, queue: queue);
+    final NavNotifyElement e = new NavNotifyElement(repository);
     document.body.append(e);
     await e.onRendered.first;
     expect(repository.hasListeners, isTrue, reason: 'is listening');
@@ -61,7 +57,7 @@ main() {
             const EventNotificationMock(event: const VMUpdateEventMock(vm: vm)),
             const EventNotificationMock(event: const VMUpdateEventMock(vm: vm))
           ]);
-      final NavNotifyElement e = new NavNotifyElement(repository, queue: queue);
+      final NavNotifyElement e = new NavNotifyElement(repository);
       document.body.append(e);
       await e.onRendered.first;
       expect(repository.listInvoked, isTrue, reason: 'should invoke list()');
@@ -81,7 +77,7 @@ main() {
                 event: const PauseStartEventMock(isolate: isolate))
           ]);
       final NavNotifyElement e = new NavNotifyElement(repository,
-          notifyOnPause: true, queue: queue);
+          notifyOnPause: true);
       document.body.append(e);
       await e.onRendered.first;
       expect(e.querySelectorAll(evTag).length, equals(2));
@@ -106,7 +102,7 @@ main() {
       final NotificationRepositoryMock repository =
           new NotificationRepositoryMock(list: list);
       final NavNotifyElement e = new NavNotifyElement(repository,
-          notifyOnPause: true, queue: queue);
+          notifyOnPause: true);
       document.body.append(e);
       await e.onRendered.first;
       expect(e.querySelectorAll(evTag).length, equals(1));