Revert to zero-initializing buffers for FFmpegVideoDecoder

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 947e8afd4fd6cfd819c45d743894c54a75cc9d60..32c3b76481c57566973959737838dba9074a45ae 100644
--- a/media/base/video_frame_pool.h
+++ b/media/base/video_frame_pool.h
@@ -25,12 +25,16 @@ class MEDIA_EXPORT VideoFramePool {
 
   // Returns a frame from the pool that matches the specified
   // parameters or creates a new frame if no suitable frame exists in
-  // the pool.
+  // the pool. The pool is drained if no matching frame is found.
+  // If a new frame must be created and |zero_new_frames| is true, the buffer
+  // for the new frame will be zero initialized.  Reused frames will not be zero
+  // initialized.
   scoped_refptr<VideoFrame> CreateFrame(VideoPixelFormat format,
                                         const gfx::Size& coded_size,
                                         const gfx::Rect& visible_rect,
                                         const gfx::Size& natural_size,
-                                        base::TimeDelta timestamp);
+                                        base::TimeDelta timestamp,
+                                        bool zero_new_frames);
 
 protected:
   friend class VideoFramePoolTest;