The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 const TEST_MSG = "ContentSearchTest";

 const SERVICE_EVENT_TYPE = "ContentSearchService";

 const CLIENT_EVENT_TYPE = "ContentSearchClient";

 // Forward events from the in-content service to the test.

 content.addEventListener(SERVICE_EVENT_TYPE, event => {

   sendAsyncMessage(TEST_MSG, event.detail);

 });

 // Forward messages from the test to the in-content service.

 addMessageListener(TEST_MSG, msg => {

   content.dispatchEvent(

     new content.CustomEvent(CLIENT_EVENT_TYPE, {

       detail: msg.data,

     })

   );

 });