Upgrading tests with unittest deprecations

tests/html/request_animation_frame_test.dart

 // Copyright (c) 2012, 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.
 
 library RequestAnimationFrameTest;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
 import 'dart:html';
 
 main() {
   useHtmlConfiguration();
 
   test('oneShot', () {
       var frame = window.requestAnimationFrame(
-          expectAsync1((timestamp) { }));
+          expectAsync((timestamp) { }));
     });
 
   test('twoShot', () {
       var frame = window.requestAnimationFrame(
-          expectAsync1((timestamp1) {
+          expectAsync((timestamp1) {
             window.requestAnimationFrame(
-                expectAsync1((timestamp2) {
+                expectAsync((timestamp2) {
                     // Not monotonic on Safari and IE.
                     // expect(timestamp2, greaterThan(timestamp1),
                     //    reason: 'timestamps ordered');
                   }));
           }));
     });
 
 
   // How do we test that a callback is never called?  We can't wrap the uncalled
-  // callback with 'expectAsync1'.  Will request several frames and try
+  // callback with 'expectAsync'.  Will request several frames and try
   // cancelling the one that is not the last.
   test('cancel1', () {
       var frame1 = window.requestAnimationFrame(
           (timestamp1) {
             throw new Exception('Should have been cancelled');
           });
       var frame2 = window.requestAnimationFrame(
-          expectAsync1((timestamp2) { }));
+          expectAsync((timestamp2) { }));
       window.cancelAnimationFrame(frame1);
     });
 
   test('cancel2', () {
       var frame1 = window.requestAnimationFrame(
-          expectAsync1((timestamp1) { }));
+          expectAsync((timestamp1) { }));
       var frame2 = window.requestAnimationFrame(
           (timestamp2) {
             throw new Exception('Should have been cancelled');
           });
       var frame3 = window.requestAnimationFrame(
-          expectAsync1((timestamp3) { }));
+          expectAsync((timestamp3) { }));
       window.cancelAnimationFrame(frame2);
     });
 }