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

runtime/observatory/tests/observatory_ui/curly_block/element_test.dart

 // Copyright (c) 2016, 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.
 import 'dart:html';
 import 'package:unittest/unittest.dart';
 import 'package:observatory/src/elements/curly_block.dart';
-import 'package:observatory/src/elements/helpers/rendering_queue.dart';
 
 main() {
   CurlyBlockElement.tag.ensureRegistration();
 
-  final TimedRenderingBarrier barrier = new TimedRenderingBarrier();
-  final RenderingQueue queue = new RenderingQueue.fromBarrier(barrier);
   group('instantiation', () {
     test('default', () {
       final CurlyBlockElement e = new CurlyBlockElement();
       expect(e, isNotNull, reason: 'element correctly created');
       expect(e.expanded, isFalse);
       expect(e.disabled, isFalse);
     });
     test('not expanded', () {
       final CurlyBlockElement e = new CurlyBlockElement(expanded: false);
       expect(e, isNotNull, reason: 'element correctly created');
@@ skipping 41 matching lines @@
       expect(e.disabled, isFalse);
     });
     test('disabled', () {
       final CurlyBlockElement e = new CurlyBlockElement(disabled: true);
       expect(e, isNotNull, reason: 'element correctly created');
       expect(e.expanded, isFalse);
       expect(e.disabled, isTrue);
     });
   });
   test('elements created', () async {
-    final CurlyBlockElement e = new CurlyBlockElement(queue: queue);
+    final CurlyBlockElement e = new CurlyBlockElement();
     expect(e.shadowRoot, isNotNull, reason: 'shadowRoot is created');
     document.body.append(e);
     await e.onRendered.first;
     expect(e.shadowRoot.children.length, isNonZero,
       reason: 'shadowRoot has elements');
     e.remove();
     await e.onRendered.first;
     expect(e.shadowRoot.children.length, isZero, reason: 'shadowRoot is empty');
   });
   group('content', () {
     CurlyBlockElement e;
     setUp(() async {
-      e = new CurlyBlockElement(queue: queue);
+      e = new CurlyBlockElement();
       document.body.append(e);
       await e.onRendered.first;
     });
-    tearDown(() async {
+    tearDown(() {
       e.remove();
-      await e.onRendered.first;
     });
     test('toggles visibility', () async {
       expect(e.shadowRoot.querySelector('content'), isNull);
       e.toggle();
       await e.onRendered.first;
       expect(e.shadowRoot.querySelector('content'), isNotNull);
       e.toggle();
       await e.onRendered.first;
       expect(e.shadowRoot.querySelector('content'), isNull);
+      e.remove();
     });
     test('toggles visibility (manually)', () async {
       expect(e.shadowRoot.querySelector('content'), isNull);
       e.expanded = true;
       await e.onRendered.first;
       expect(e.shadowRoot.querySelector('content'), isNotNull);
       e.expanded = false;
       await e.onRendered.first;
       expect(e.shadowRoot.querySelector('content'), isNull);
+      e.remove();
     });
     test('does not toggle if disabled', () async {
       e.disabled = true;
       await e.onRendered.first;
       expect(e.expanded, isFalse);
       expect(e.shadowRoot.querySelector('content'), isNull);
       e.toggle();
       await e.onRendered.first;
       expect(e.expanded, isFalse);
       expect(e.shadowRoot.querySelector('content'), isNull);
       e.disabled = false;
       e.toggle();
       await e.onRendered.first;
       expect(e.expanded, isTrue);
       expect(e.shadowRoot.querySelector('content'), isNotNull);
       e.disabled = true;
       e.toggle();
       await e.onRendered.first;
       expect(e.expanded, isTrue);
       expect(e.shadowRoot.querySelector('content'), isNotNull);
+      e.remove();
     });
     test('toggles visibility (manually) if disabled', () async {
       e.disabled = true;
       await e.onRendered.first;
       expect(e.shadowRoot.querySelector('content'), isNull);
       e.expanded = true;
       await e.onRendered.first;
       expect(e.shadowRoot.querySelector('content'), isNotNull);
       e.expanded = false;
       await e.onRendered.first;
       expect(e.shadowRoot.querySelector('content'), isNull);
+      e.remove();
     });
   });
   group('event', () {
     CurlyBlockElement e;
     setUp(() async {
-      e = new CurlyBlockElement(queue: queue);
+      e = new CurlyBlockElement();
       document.body.append(e);
       await e.onRendered.first;
     });
     tearDown(() async {
       e.remove();
       await e.onRendered.first;
     });
     test('fires on toggle', () async {
       e.onToggle.listen(expectAsync((CurlyBlockToggleEvent event){
         expect(event, isNotNull);
@@ skipping 10 matching lines @@
       e.expanded = !e.expanded;
       await e.onRendered.first;
     });
     test('does not fire if setting same expanded value', () async {
       e.onToggle.listen(expectAsync((_){}, count: 0));
       e.expanded = e.expanded;
       await e.onRendered.first;
     });
   });
 }