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

content/renderer/media/rtc_video_decoder.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
 #define CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 138 matching lines @@
       const media::PictureBuffer& pb,
       uint32_t timestamp,
       uint32_t width,
       uint32_t height,
       size_t size);
 
   // Resets VDA.
   void ResetInternal();
 
   // Tells VDA that a picture buffer can be recycled.
-  void ReusePictureBuffer(int64 picture_buffer_id, uint32 sync_point);
+  void ReusePictureBuffer(int64 picture_buffer_id,
+                          scoped_ptr<gpu::MailboxHolder> mailbox_holder);
 
   void DestroyTextures();
   void DestroyVDA();
 
   // Gets a shared-memory segment of at least |min_size| bytes from
   // |available_shm_segments_|. Returns NULL if there is no buffer or the
   // buffer is not big enough.
   scoped_ptr<SHMBuffer> GetSHM_Locked(size_t min_size);
 
   // Returns a shared-memory segment to the available pool.
@@ skipping 101 matching lines @@
   // Factory used to populate |weak_this_|. Must be destroyed, or invalidated,
   // on |vda_loop_proxy_|.
   base::WeakPtrFactory<RTCVideoDecoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RTCVideoDecoder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RTC_VIDEO_DECODER_H_