Support Timer with 0 millisecond delay in dart2js running in the command line.

tests/lib/async/future_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 future_test;
 
 import 'dart:async';
 import 'dart:isolate';
 
 testImmediate() {
   final future = new Future<String>.immediate("42");
   var port = new ReceivePort();
   future.then((x) {
     Expect.equals("42", x);
     port.close();
   });
 }
 
 testNeverComplete() {
   final completer = new Completer<int>();
   final future = completer.future;
-  future.then((v) => Except.fails("Value not expected"));
-  future.catchError((e) => Except.fails("Value not expected"));
+  future.then((v) => Expect.fails("Value not expected"));
+  future.catchError((e) => Expect.fails("Value not expected"));
 }
 
 testComplete() {
   final completer = new Completer<int>();
   final future = completer.future;
 
   completer.complete(3);
 
   future.then((v) => Expect.equals(3, v));
 }
@@ skipping 515 matching lines @@
   testFutureWhenErrorFutureValue();
   testFutureWhenValueFutureError();
   testFutureWhenErrorFutureError();
 
   testFutureThenThrowsAsync();
   testFutureCatchThrowsAsync();
   testFutureWhenThrowsAsync();
   testFutureCatchRethrowsAsync();
 }