[chromecast] Adds MediaSinkDefault.

chromecast/media/cma/backend/audio_decoder_default.h

Index: chromecast/media/cma/backend/audio_decoder_default.h
diff --git a/chromecast/media/cma/backend/audio_decoder_default.h b/chromecast/media/cma/backend/audio_decoder_default.h
index ea712dad6b613d957ba339611dbfbc14ff63050b..142de3b98968b62ba5fb9b936d86ff8b49c21a45 100644
--- a/chromecast/media/cma/backend/audio_decoder_default.h
+++ b/chromecast/media/cma/backend/audio_decoder_default.h
@@ -5,21 +5,26 @@
 #ifndef CHROMECAST_MEDIA_CMA_BACKEND_AUDIO_DECODER_DEFAULT_H_
 #define CHROMECAST_MEDIA_CMA_BACKEND_AUDIO_DECODER_DEFAULT_H_
 
-#include <stdint.h>
+#include <memory>
 
 #include "base/macros.h"
-#include "base/memory/weak_ptr.h"
+#include "base/time/time.h"
 #include "chromecast/public/media/media_pipeline_backend.h"
 
 namespace chromecast {
 namespace media {
 
+class MediaSinkDefault;
+
 class AudioDecoderDefault : public MediaPipelineBackend::AudioDecoder {
  public:
   AudioDecoderDefault();
   ~AudioDecoderDefault() override;
 
-  int64_t last_push_pts() const { return last_push_pts_; }
+  void Start(base::TimeDelta start_pts);
+  void Stop();
+  void SetPlaybackRate(float rate);
+  base::TimeDelta GetCurrentPts();
 
   // MediaPipelineBackend::AudioDecoder implementation:
   void SetDelegate(Delegate* delegate) override;
@@ -31,12 +36,8 @@ class AudioDecoderDefault : public MediaPipelineBackend::AudioDecoder {
   RenderingDelay GetRenderingDelay() override;
 
  private:
-  void OnEndOfStream();
-
   Delegate* delegate_;
-  int64_t last_push_pts_;
-  base::WeakPtrFactory<AudioDecoderDefault> weak_factory_;
-
+  std::unique_ptr<MediaSinkDefault> sink_;
   DISALLOW_COPY_AND_ASSIGN(AudioDecoderDefault);
 };