1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #ifndef MOZILLA_PRINCIPALCHANGEOBSERVER_H_
8 #define MOZILLA_PRINCIPALCHANGEOBSERVER_H_
10 namespace mozilla::dom
{
13 * A PrincipalChangeObserver for any type, but originating from DOMMediaStream,
14 * then expanded to MediaStreamTrack.
16 * Used to learn about dynamic changes to an object's principal.
17 * Operations relating to these observers must be confined to the main thread.
20 class PrincipalChangeObserver
{
22 virtual void PrincipalChanged(T
* aArg
) = 0;
25 } // namespace mozilla::dom
27 #endif /* MOZILLA_PRINCIPALCHANGEOBSERVER_H_ */