Motown: Convert MediaSink to expose MediaTimelineControlSite

services/media/factory_service/audio_track_controller.h

Index: services/media/factory_service/audio_track_controller.h
diff --git a/services/media/factory_service/audio_track_controller.h b/services/media/factory_service/audio_track_controller.h
index 6a60dc9e40d33ebd298e8d9b00a2a8ff4b3b6890..0674e419168e8192008c79d26baa43231235b3ee 100644
--- a/services/media/factory_service/audio_track_controller.h
+++ b/services/media/factory_service/audio_track_controller.h
@@ -18,8 +18,7 @@ class AudioTrackController {
  public:
   using GetSupportedMediaTypesCallback = std::function<void(
       std::unique_ptr<std::vector<std::unique_ptr<StreamTypeSet>>>)>;
-  using ConfigureCallback =
-      std::function<void(MediaConsumerPtr, MediaTimelineControlSitePtr)>;
+  using ConfigureCallback = std::function<void(MediaConsumerPtr)>;
 
   AudioTrackController(const String& url, ApplicationImpl* app);
 
@@ -32,6 +31,9 @@ class AudioTrackController {
   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_;
 };