code: function messageHandlerSend(actionName, data, transfers) {
      var message = {
        action: actionName,
        data: data
      };
      this.postMessage(message, transfers);
    }
docs: Sends a message to the comObj to invoke the action with the supplied data.
  @param {String} actionName Action to call.
  @param {JSON} data JSON data to send.
  @param {Array} [transfers] Optional list of transfers/ArrayBuffers