/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* 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/. */ #ifndef MOZILLA_PRINCIPALCHANGEOBSERVER_H_ #define MOZILLA_PRINCIPALCHANGEOBSERVER_H_ namespace mozilla { namespace dom { /** * A PrincipalChangeObserver for any type, but originating from DOMMediaStream, * then expanded to MediaStreamTrack. * * Used to learn about dynamic changes to an object's principal. * Operations relating to these observers must be confined to the main thread. */ template<typename T> class PrincipalChangeObserver { public: virtual void PrincipalChanged(T* aArg) = 0; }; } // namespace dom } // namespace mozilla #endif /* MOZILLA_PRINCIPALCHANGEOBSERVER_H_ */