Allow to use {FFmpeg/Vpx}VideoDecoder from a UtilityProcess

media/base/video_frame_pool.h

Index: media/base/video_frame_pool.h
diff --git a/media/base/video_frame_pool.h b/media/base/video_frame_pool.h
index ebd0e249af2e7a9d4f792c4ccb23657c7b5a214c..6563417552b2904e76dda0c1760ffc8e920fbec4 100644
--- a/media/base/video_frame_pool.h
+++ b/media/base/video_frame_pool.h
@@ -13,6 +13,8 @@
 
 namespace media {
 
+class VideoFrameProvider;
+
 // Simple VideoFrame pool used to avoid unnecessarily allocating and destroying
 // VideoFrame objects. The pool manages the memory for the VideoFrame
 // returned by CreateFrame(). When one of these VideoFrames is destroyed,
@@ -24,6 +26,8 @@ namespace media {
 class MEDIA_EXPORT VideoFramePool {
  public:
   VideoFramePool();
+  explicit VideoFramePool(
+      std::unique_ptr<VideoFrameProvider> video_frame_provider);
   ~VideoFramePool();
 
   // Returns a frame from the pool that matches the specified
@@ -37,7 +41,7 @@ class MEDIA_EXPORT VideoFramePool {
                                         const gfx::Size& natural_size,
                                         base::TimeDelta timestamp);
 
-protected:
+ protected:
   friend class VideoFramePoolTest;
 
   // Returns the number of frames in the pool for testing purposes.
@@ -45,6 +49,7 @@ protected:
 
  private:
   class PoolImpl;
+  std::unique_ptr<VideoFrameProvider> video_frame_provider_;
   scoped_refptr<PoolImpl> pool_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoFramePool);