[Chromecast] Add new volume control API to CastMediaShlib

chromecast/media/cma/backend/media_pipeline_backend_wrapper.h

Index: chromecast/media/cma/backend/media_pipeline_backend_wrapper.h
diff --git a/chromecast/media/cma/backend/media_pipeline_backend_wrapper.h b/chromecast/media/cma/backend/media_pipeline_backend_wrapper.h
index ad158913e6c396823e84b69593ed51662798b5ef..24b8b65d4d7441a5a84d21f429aa0d0e74314cb1 100644
--- a/chromecast/media/cma/backend/media_pipeline_backend_wrapper.h
+++ b/chromecast/media/cma/backend/media_pipeline_backend_wrapper.h
@@ -12,7 +12,6 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
-#include "chromecast/media/cma/backend/audio_decoder_wrapper.h"
 #include "chromecast/public/media/media_pipeline_backend.h"
 #include "chromecast/public/media/media_pipeline_device_params.h"
 
@@ -23,9 +22,7 @@ class MediaPipelineBackendManager;
 
 class MediaPipelineBackendWrapper : public MediaPipelineBackend {
  public:
-  MediaPipelineBackendWrapper(std::unique_ptr<MediaPipelineBackend> backend,
-                              int stream_type,
-                              float stream_type_volume,
+  MediaPipelineBackendWrapper(const media::MediaPipelineDeviceParams& params,
                               MediaPipelineBackendManager* backend_manager);
   ~MediaPipelineBackendWrapper() override;
 
@@ -40,18 +37,17 @@ class MediaPipelineBackendWrapper : public MediaPipelineBackend {
   int64_t GetCurrentPts() override;
   bool SetPlaybackRate(float rate) override;
 
-  int GetStreamType() const;
-  void SetStreamTypeVolume(float stream_type_volume);
-
  private:
-  std::unique_ptr<MediaPipelineBackend> backend_;
-  const int stream_type_;
-  std::unique_ptr<AudioDecoderWrapper> audio_decoder_wrapper_;
-  float stream_type_volume_;
-  bool is_initialized_;
-  bool have_video_decoder_;
+  void SetPlaying(bool playing);
+
+  const std::unique_ptr<MediaPipelineBackend> backend_;
   MediaPipelineBackendManager* const backend_manager_;
 
+  bool sfx_backend_;
+  bool have_audio_decoder_;
+  bool have_video_decoder_;
+  bool playing_;
+
   DISALLOW_COPY_AND_ASSIGN(MediaPipelineBackendWrapper);
 };