Converted Observatory cpu-profile element

runtime/observatory/tests/observatory_ui/nav/notify/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' hide Notification, NotificationEvent;
 import 'package:unittest/unittest.dart';
 import 'package:observatory/models.dart' as M;
 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';
 import '../../mocks.dart';
 
 main() {
   NavNotifyElement.tag.ensureRegistration();
@@ skipping 95 matching lines @@
       repository.triggerChangeEvent();
       await e.onRendered.first;
       expect(e.querySelectorAll(evTag).length, equals(2));
       expect(e.querySelectorAll(exTag).length, equals(1));
       e.remove();
       await e.onRendered.first;
       expect(e.children.length, isZero, reason: 'is empty');
     });
   });
 }