Reverting setTimeout removal.

tests/html/js_interop_4_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 JsInterop4Test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
-import 'dart:async';
 import 'dart:html';
 import 'dart:isolate';
 
 const testData = const [1, '2', 'true'];
 
 void testIsolateEntry() {
   var fun1 = window.lookupPort('fun1');
   var result = fun1.callSync(testData);
 
   var fun2 = window.lookupPort('fun2');
@@ skipping 27 matching lines @@
     };
 
     var port1 = new ReceivePortSync();
     port1.receive(fun1);
     window.registerPort('fun1', port1.toSendPort());
 
     // TODO(vsm): Investigate why this needs to be called asynchronously.
     var done = expectAsync0(() {});
     var fun2 = (message) {
       expect(message, 3);
-      Timer.run(done);
+      window.setTimeout(done, 0);
     };
 
     var port2 = new ReceivePortSync();
     port2.receive(fun2);
     window.registerPort('fun2', port2.toSendPort());
 
     spawnDomFunction(testIsolateEntry);
   });
 }