Reapply remove setInterval.

samples/dartcombat/setup.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.
 
 part of dartcombatlib;
 
 /** Entrypoint to set up the dartcombat sample. */
 void setUpGame() {
   setupUI();
   createPlayers();
@@ skipping 62 matching lines @@
   ReceivePort proxy;
 
   SendPort _target;
 
   SendPort get sendPort => proxy.toSendPort();
 
   FlakyProxy(this._target) {
     proxy = new ReceivePort();
 
     proxy.receive((message, SendPort reply) {
-      window.setTimeout(() {
+      new Timer(const Duration(milliseconds: 200), () {
         if (randomlyFail()) {
           reply.send(const [false, "There was an error"], null);
         } else {
           _target.send(message, reply);
         }
-      }, 200);
+      });
     });
   }
 
   // TODO(sigmund): introduce UI to control flakiness, then do:
   // => Math.random() > 0.9;
   bool randomlyFail() => false;
 }