Always initialize the EventHandler in the standalone.

sdk/lib/io/eventhandler.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 dart.io;
 
 class _EventHandler {
-  external static void _start();
-  external static _sendData(Object sender, ReceivePort receivePort, int data);
+  external static void _sendData(Object sender,
+                                 ReceivePort receivePort,
+                                 int data);
 }