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

content/browser/renderer_host/software_frame_manager.cc

 // 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.
 
 #include "content/browser/renderer_host/software_frame_manager.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/debug/alias.h"
 #include "content/browser/renderer_host/dip_util.h"
 #include "content/public/browser/user_metrics.h"
 
 namespace {
 
 void ReleaseMailbox(scoped_refptr<content::SoftwareFrame> frame,
-                    unsigned sync_point,
+                    uint32 sync_point,
                     bool lost_resource) {}
 
 }  // namespace
 
 namespace content {
 
 ////////////////////////////////////////////////////////////////////////////////
 // SoftwareFrame
 
 class CONTENT_EXPORT SoftwareFrame : public base::RefCounted<SoftwareFrame> {
@@ skipping 170 matching lines @@
 }
 
 void SoftwareFrameManager::EvictCurrentFrame() {
   DCHECK(HasCurrentFrame());
   DiscardCurrentFrame();
   if (client_)
     client_->ReleaseReferencesToSoftwareFrame();
 }
 
 }  // namespace content