The Tor Browser / file revision

 /* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /* 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/.

  */

 [Constructor(DOMString type, optional TrackEventInit eventInitDict)]

 interface TrackEvent : Event

 {

   readonly attribute TextTrack? track;

 };

 dictionary TrackEventInit : EventInit

 {

   TextTrack? track = null;

 };