);
      }
    } else {
      console.error("WebChannel channel id missing");
    }
  }

  /**
   *
   * @param id {String}
   *        The WebChannel id to include in the message
   * @param sendingContext {Object}
   *        Message sending context
   * @param [errorMsg] {String}
   *        Error message
   * @private
   */
  _sendErrorEventToContent(id, sendingContext, errorNo, errorMsg) {
    let { eventTarget, principal } = sendingContext;

    errorMsg = errorMsg || "Web Channel Parent error";

    let { currentWindowGlobal = null } = this.browsingContext;
    if (currentWindowGlobal) {
      currentWindowGlobal
        .getActor("WebChannel")
        .sendAsyncMessage("WebChannelMessageToContent", {
          id,
          message: {
            errno: errorNo,
            error: errorMsg,
          },
          eventTarget,
          principal,
        });
    } else {
      console.error("Failed to send a WebChannel error. Target invalid.");
    }
    console.error(id.toString() + " error message. ", errorMsg);
  }
}
PK