GPU: Adding sync points for cross-channel synchronization

ppapi/proxy/ppapi_command_buffer_proxy.h

 // Copyright (c) 2012 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 PPAPI_PROXY_COMMAND_BUFFER_PROXY_H_
 #define PPAPI_PROXY_COMMAND_BUFFER_PROXY_H_
 #pragma once
 
 #include "base/callback.h"
 #include "base/hash_tables.h"
@@ skipping 18 matching lines @@
   virtual ~PpapiCommandBufferProxy();
 
   void ReportChannelError();
 
   // CommandBufferProxy implementation:
   virtual int GetRouteID() const OVERRIDE;
   virtual bool Echo(const base::Closure& callback) OVERRIDE;
   virtual bool SetSurfaceVisible(bool visible) OVERRIDE;
   virtual bool DiscardBackbuffer() OVERRIDE;
   virtual bool EnsureBackbuffer() OVERRIDE;
+  virtual uint32 InsertSyncPoint() OVERRIDE;
+  virtual void WaitSyncPoint(uint32 sync_point) OVERRIDE;
   virtual void SetMemoryAllocationChangedCallback(
       const base::Callback<void(const GpuMemoryAllocationForRenderer&)>&
           callback) OVERRIDE;
   virtual bool SetParent(CommandBufferProxy* parent_command_buffer,
                          uint32 parent_texture_id) OVERRIDE;
   virtual void SetChannelErrorCallback(const base::Closure& callback) OVERRIDE;
   virtual void SetNotifyRepaintTask(const base::Closure& callback) OVERRIDE;
   virtual void SetOnConsoleMessageCallback(
       const GpuConsoleMessageCallback& callback) OVERRIDE;
 
@@ skipping 29 matching lines @@
 
   base::Closure channel_error_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PpapiCommandBufferProxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif // PPAPI_PROXY_COMMAND_BUFFER_PROXY_H_