Reapply remove setTimeout, take 3.

samples/tests/samples/swarm/swarm_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 swarm_tests;
 
 import 'dart:html';
+import 'dart:async';
 import '../../../swarm/swarmlib.dart';
 import '../../../swarm/swarm_ui_lib/base/base.dart';
 import '../../../swarm/swarm_ui_lib/view/view.dart';
 import '../../../swarm/swarm_ui_lib/util/utilslib.dart';
 import '../../../../pkg/unittest/lib/unittest.dart';
 import '../../../../pkg/unittest/lib/html_config.dart';
 
 // TODO(jmesserly): these would probably be easier to debug if they were written
 // in the WebKit layout test style, so we could easy compare that the DOM is
 // what we expect it to be after performing some simulated user actions.
@@ skipping 124 matching lines @@
 }
 
 void _serialInvokeAsync(List closures) {
   final length = closures.length;
   if (length > 0) {
     int i = 0;
     void invokeNext() {
       closures[i]();
       i++;
       if (i < length) {
-        window.setTimeout(expectAsync0(invokeNext), 0);
+        Timer.run(expectAsync0(invokeNext));
       }
     }
-    window.setTimeout(expectAsync0(invokeNext), 0);
+    Timer.run(expectAsync0(invokeNext));
   }
 }