Add gpu::MailboxHolder to hold state for a gpu::Mailbox

content/renderer/media/android/webmediaplayer_android.h

Index: content/renderer/media/android/webmediaplayer_android.h
diff --git a/content/renderer/media/android/webmediaplayer_android.h b/content/renderer/media/android/webmediaplayer_android.h
index 40582ca1c8adad1304251699ae2702d4ca3b85a9..56c4a0988866e53b4c5cf3243b3d9f739ba952ad 100644
--- a/content/renderer/media/android/webmediaplayer_android.h
+++ b/content/renderer/media/android/webmediaplayer_android.h
@@ -236,7 +236,7 @@ class WebMediaPlayerAndroid
   static void OnReleaseRemotePlaybackTexture(
       const scoped_refptr<base::MessageLoopProxy>& main_loop,
       const base::WeakPtr<WebMediaPlayerAndroid>& player,
-      uint32 sync_point);
+      scoped_ptr<gpu::MailboxHolder> mailbox_holder);
 
  protected:
   // Helper method to update the playing state.
@@ -261,7 +261,8 @@ class WebMediaPlayerAndroid
   void ReallocateVideoFrame();
   void SetCurrentFrameInternal(scoped_refptr<media::VideoFrame>& frame);
   void DidLoadMediaInfo(MediaInfoLoader::Status status);
-  void DoReleaseRemotePlaybackTexture(uint32 sync_point);
+  void DoReleaseRemotePlaybackTexture(
+      scoped_ptr<gpu::MailboxHolder> mailbox_holder);
 
   bool IsKeySystemSupported(const blink::WebString& key_system);