Upgrading tests with unittest deprecations

tests/html/element_test.dart

 // Copyright (c) 2011, 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 ElementTest;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:async';
 import 'dart:html';
 import 'dart:svg' as svg;
@@ skipping 756 matching lines @@
           ..classes.add('selector')
           ..children.add(clickOne);
 
       Element clickTwo = new Element.a();
       Element selectorTwo = new Element.div()
           ..classes.add('selector')
           ..children.add(clickTwo);
       document.body.append(selectorOne);
       document.body.append(selectorTwo);
 
-      document.body.onClick.matches('.selector').listen(expectAsync1(
+      document.body.onClick.matches('.selector').listen(expectAsync(
           (Event event) {
         expect(event.currentTarget, document.body);
         expect(event.target, clickOne);
         expect(event.matchingTarget, selectorOne);
       }));
 
-      selectorOne.onClick.matches('.selector').listen(expectAsync1(
+      selectorOne.onClick.matches('.selector').listen(expectAsync(
           (Event event) {
         expect(event.currentTarget, selectorOne);
         expect(event.target, clickOne);
         expect(event.matchingTarget, selectorOne);
       }));
       clickOne.click();
 
       Element elem = new Element.div()..classes.addAll(['a', 'b']);
       Element img = new Element.img()
         ..classes.addAll(['b', 'a', 'd'])
@@ skipping 174 matching lines @@
 
     test('sublist', () {
       var range = makeElementList().sublist(1, 3);
       expect(range.length, 2);
       expect(range[0], isBRElement);
       expect(range[1], isBRElement);
     });
 
   });
 }