Motown: Define MediaRenderer and make it the way we identify renderers.

services/media/factory_service/audio_track_controller.h

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef SERVICES_MEDIA_FACTORY_SERVICE_AUDIO_TRACK_CONTROLLER_H_
-#define SERVICES_MEDIA_FACTORY_SERVICE_AUDIO_TRACK_CONTROLLER_H_
-
-#include "mojo/services/media/audio/interfaces/audio_track.mojom.h"
-#include "mojo/services/media/common/interfaces/media_transport.mojom.h"
-#include "services/media/framework/types/stream_type.h"
-
-namespace mojo {
-
-class Shell;
-
-namespace media {
-
-// Controls an audio track.
-class AudioTrackController {
- public:
-  using GetSupportedMediaTypesCallback = std::function<void(
-      std::unique_ptr<std::vector<std::unique_ptr<StreamTypeSet>>>)>;
-  using ConfigureCallback = std::function<void(MediaConsumerPtr)>;
-
-  AudioTrackController(const String& url, Shell* shell);
-
-  ~AudioTrackController();
-
-  // Gets the media types supported by the audio track.
-  void GetSupportedMediaTypes(const GetSupportedMediaTypesCallback& callback);
-
-  // Configures the controller.
-  void Configure(const std::unique_ptr<StreamType>& stream_type,
-                 const ConfigureCallback& callback);
-
-  // Gets the timeline control site for the audio track.
-  void GetTimelineControlSite(InterfaceRequest<MediaTimelineControlSite> req);
-
- private:
-  AudioTrackPtr audio_track_;
-};
-
-}  // namespace media
-}  // namespace mojo
-
-#endif  // SERVICES_MEDIA_FACTORY_SERVICE_AUDIO_TRACK_CONTROLLER_H_