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

media/filters/gpu_video_decoder.cc

Index: media/filters/gpu_video_decoder.cc
diff --git a/media/filters/gpu_video_decoder.cc b/media/filters/gpu_video_decoder.cc
index 0b8e60220a0660491cc28c5877f69866120f9b87..6d560e118626207ff462422d7ec9fb0c5d057714 100644
--- a/media/filters/gpu_video_decoder.cc
+++ b/media/filters/gpu_video_decoder.cc
@@ -441,13 +441,11 @@ void GpuVideoDecoder::PictureReady(const media::Picture& picture) {
   DCHECK(decoder_texture_target_);
 
   scoped_refptr<VideoFrame> frame(VideoFrame::WrapNativeTexture(
-      make_scoped_ptr(new VideoFrame::MailboxHolder(
-          pb.texture_mailbox(),
-          0,  // sync_point
-          BindToCurrentLoop(base::Bind(&GpuVideoDecoder::ReusePictureBuffer,
-                                       weak_this_,
-                                       picture.picture_buffer_id())))),
-      decoder_texture_target_,
+      make_scoped_ptr(new gpu::MailboxHolder(
+          pb.texture_mailbox(), decoder_texture_target_, 0 /* sync_point */)),
+      BindToCurrentLoop(base::Bind(&GpuVideoDecoder::ReusePictureBuffer,
+                                   weak_this_,
+                                   picture.picture_buffer_id())),
       pb.size(),
       visible_rect,
       natural_size,
@@ -455,8 +453,7 @@ void GpuVideoDecoder::PictureReady(const media::Picture& picture) {
       base::Bind(&GpuVideoAcceleratorFactories::ReadPixels,
                  factories_,
                  pb.texture_id(),
-                 gfx::Size(visible_rect.width(), visible_rect.height())),
-      base::Closure()));
+                 gfx::Size(visible_rect.width(), visible_rect.height()))));
   CHECK_GT(available_pictures_, 0);
   --available_pictures_;
   bool inserted =
@@ -488,8 +485,9 @@ void GpuVideoDecoder::EnqueueFrameAndTriggerFrameDelivery(
   ready_video_frames_.pop_front();
 }
 
-void GpuVideoDecoder::ReusePictureBuffer(int64 picture_buffer_id,
-                                         uint32 sync_point) {
+void GpuVideoDecoder::ReusePictureBuffer(
+    int64 picture_buffer_id,
+    scoped_ptr<gpu::MailboxHolder> mailbox_holder) {
   DVLOG(3) << "ReusePictureBuffer(" << picture_buffer_id << ")";
   DCHECK(gvd_loop_proxy_->BelongsToCurrentThread());
 
@@ -513,7 +511,7 @@ void GpuVideoDecoder::ReusePictureBuffer(int64 picture_buffer_id,
     return;
   }
 
-  factories_->WaitSyncPoint(sync_point);
+  factories_->WaitSyncPoint(mailbox_holder->sync_point());
   ++available_pictures_;
 
   vda_->ReusePictureBuffer(picture_buffer_id);