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