pkg/polymer[_expressions] unittest fixes

pkg/polymer_expressions/test/bindings_test.dart

 // Copyright (c) 2013, 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 bindings_test;
 
 import 'dart:async';
 import 'dart:html';
 
 import 'package:observe/observe.dart';
@@ skipping 66 matching lines @@
     });
 
     test('should preserve the cursor position', () {
       var model = new NotifyModel('abcde');
       var template = templateBind(new Element.html(
           '<template><input id="i1" value={{x}}></template>'));
       testDiv.append(template.createInstance(model, new PolymerExpressions()));
 
       return new Future(() {
         var el = testDiv.query("#i1");
-        var subscription = el.onInput.listen(expectAsync1((_) {}, count: 1));
+        var subscription = el.onInput.listen(expectAsync((_) {}, count: 1));
         el.focus();
 
         expect(el.value, 'abcde');
         expect(model.x, 'abcde');
 
         el.selectionStart = 3;
         el.selectionEnd = 3;
         expect(el.selectionStart, 3);
         expect(el.selectionEnd, 3);
 
@@ skipping 48 matching lines @@
 @reflectable
 class NotifyModel extends ChangeNotifier {
   var _x;
   NotifyModel([this._x]);
 
   get x => _x;
   set x(value) {
     _x = notifyPropertyChange(#x, _x, value);
   }
 }