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 10 matching lines @@
 #include "media/base/bitstream_buffer.h"
 #include "media/base/video_decoder.h"
 #include "media/video/picture.h"
 #include "media/video/video_decode_accelerator.h"
 #include "third_party/webrtc/modules/video_coding/codecs/interface/video_codec_interface.h"
 
 namespace base {
 class MessageLoopProxy;
 };
 
+namespace gpu {
+struct MailboxHolder;
+}
+
 namespace media {
 class DecoderBuffer;
 class GpuVideoAcceleratorFactories;
 }
 
 namespace content {
 
 // This class uses hardware accelerated video decoder to decode video for
 // WebRTC. |vda_message_loop_| is the message loop proxy of the media thread,
 // which VDA::Client methods run on. webrtc::VideoDecoder methods run on WebRTC
@@ skipping 108 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,
+                          const 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_