anchor.diff:     * is done through the port of connection.
      */
     void _connect() {
  -
       JsObject runtime = context['chrome']['runtime'];
       _port = runtime.callMethod('connectNative', [HOST_NAME]);
   
  
positive.code:   }
  
    /**
     * function for receiving messge
     */
    void _onNativeMessage(request, sender) {
      String message = context['JSON'].callMethod('stringify',[request]);
  
negative.code:     dartOnMessageEvent = (jsOnMessageEvent is JsObject ?
            jsOnMessageEvent : new JsObject.fromBrowserObject(jsOnMessageEvent));
      dartOnMessageEvent.callMethod('addListener', [_onDisconnected]);
    }
  
    void launchDartium(Notifier notifier, String path, String url) {
  