Revert https://code.google.com/p/dart/source/detail?r=33346

pkg/unittest/test/unittest_protect_async_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 unittestTest;
 import 'dart:isolate';
 import 'dart:async';
 import 'package:unittest/unittest.dart';
 
 part 'unittest_test_utils.dart';
 
 var testFunction = (_) {
   test('protectAsync0', () {
-    var protected = () {
+    var protected = protectAsync0(() {
       throw new StateError('error during protectAsync0');
-    };
+    });
     new Future(protected);
   });
 
   test('protectAsync1', () {
-    var protected = (arg) {
+    var protected = protectAsync1((arg) {
       throw new StateError('error during protectAsync1: $arg');
-    };
+    });
     new Future(() => protected('one arg'));
   });
 
   test('protectAsync2', () {
-    var protected = (arg1, arg2) {
+    var protected = protectAsync2((arg1, arg2) {
       throw new StateError('error during protectAsync2: $arg1, $arg2');
-    };
+    });
     new Future(() => protected('arg1', 'arg2'));
   });
 
   test('throw away 1', () {
     return new Future(() {});
   });
 };
 
 var expected = '1:0:3:4:0:::null:'
   'protectAsync0:Caught Bad state: error during protectAsync0:'
   'protectAsync1:Caught Bad state: error during protectAsync1: one arg:'
   'protectAsync2:Caught Bad state: error during protectAsync2: arg1, arg2:'
   'throw away 1:';