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 7e6bb2d258d5d1ad401d94f7b9edc8ddb5da16fd..5981a51a8a6dbf3d83c252f538b9f9a716d5265d 100644
--- a/content/renderer/media/android/webmediaplayer_android.h
+++ b/content/renderer/media/android/webmediaplayer_android.h
@@ -35,14 +35,18 @@ namespace base {
 class MessageLoopProxy;
 }
 
-namespace media {
-class MediaLog;
-}
-
 namespace blink {
 class WebFrame;
 }
 
+namespace gpu {
+struct MailboxHolder;
+}
+
+namespace media {
+class MediaLog;
+}
+
 namespace webkit {
 class WebLayerImpl;
 }
@@ -227,7 +231,7 @@ 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.