ReleaseOutputBuffer to surface back and front buffers where possible.

content/common/gpu/media/android_deferred_rendering_backing_strategy.h

Index: content/common/gpu/media/android_deferred_rendering_backing_strategy.h
diff --git a/content/common/gpu/media/android_deferred_rendering_backing_strategy.h b/content/common/gpu/media/android_deferred_rendering_backing_strategy.h
index 6809f4dddc853665eda0881408ae9828d4ee52e9..def6edb70c0bb71565c842770531bbed76ffdb05 100644
--- a/content/common/gpu/media/android_deferred_rendering_backing_strategy.h
+++ b/content/common/gpu/media/android_deferred_rendering_backing_strategy.h
@@ -6,6 +6,7 @@
 #define CONTENT_COMMON_GPU_MEDIA_ANDROID_DEFERRED_RENDERING_BACKING_STRATEGY_H_
 
 #include <stdint.h>
+#include <vector>
 
 #include "base/macros.h"
 #include "content/common/content_export.h"
@@ -40,16 +41,20 @@ class CONTENT_EXPORT AndroidDeferredRenderingBackingStrategy
 
   // AndroidVideoDecodeAccelerator::BackingStrategy
   gfx::ScopedJavaSurface Initialize(int surface_view_id) override;
-  void Cleanup(bool have_context,
-               const AndroidVideoDecodeAccelerator::OutputBufferMap&) override;
+  void Cleanup(
+      bool have_context,
+      const AndroidVideoDecodeAccelerator::OutputBufferMap& buffers) override;
   scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture() const override;
   uint32_t GetTextureTarget() const override;
   gfx::Size GetPictureBufferSize() const override;
-  void UseCodecBufferForPictureBuffer(int32_t codec_buffer_index,
-                                      const media::PictureBuffer&) override;
+  void UseCodecBufferForPictureBuffer(
+      int32_t codec_buffer_index,
+      const media::PictureBuffer& picture_buffer) override;
   void AssignOnePictureBuffer(const media::PictureBuffer&, bool) override;
-  void ReuseOnePictureBuffer(const media::PictureBuffer&) override;
-  void CodecChanged(media::VideoCodecBridge*) override;
+  void ReuseOnePictureBuffer(
+      const media::PictureBuffer& picture_buffer) override;
+  void MaybeRenderEarly() override;
+  void CodecChanged(media::VideoCodecBridge* codec) override;
   void ReleaseCodecBuffers(
       const AndroidVideoDecodeAccelerator::OutputBufferMap& buffers) override;
   void OnFrameAvailable() override;
@@ -94,6 +99,10 @@ class CONTENT_EXPORT AndroidDeferredRenderingBackingStrategy
 
   media::VideoCodecBridge* media_codec_;
 
+  // Picture buffer IDs that are out for display. Stored in order of frames as
+  // they are returned from the decoder.
+  std::vector<int32_t> pictures_out_for_display_;
+
   DISALLOW_COPY_AND_ASSIGN(AndroidDeferredRenderingBackingStrategy);
 };