Add OrderingBarrierCHROMIUM API.

content/common/gpu/client/command_buffer_proxy_impl.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 CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_
 #define CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_
 
 #include <map>
 #include <queue>
 #include <string>
@@ skipping 71 matching lines @@
 
   // IPC::Listener implementation:
   bool OnMessageReceived(const IPC::Message& message) override;
   void OnChannelError() override;
 
   // CommandBuffer implementation:
   bool Initialize() override;
   State GetLastState() override;
   int32 GetLastToken() override;
   void Flush(int32 put_offset) override;
+  void OrderingBarrier(int32 put_offset) override;
   void WaitForTokenInRange(int32 start, int32 end) override;
   void WaitForGetOffsetInRange(int32 start, int32 end) override;
   void SetGetBuffer(int32 shm_id) override;
   scoped_refptr<gpu::Buffer> CreateTransferBuffer(size_t size,
                                                   int32* id) override;
   void DestroyTransferBuffer(int32 id) override;
 
   // gpu::GpuControl implementation:
   gpu::Capabilities GetCapabilities() override;
   int32 CreateImage(ClientBuffer buffer,
@@ skipping 81 matching lines @@
 
   // The shared memory area used to update state.
   scoped_ptr<base::SharedMemory> shared_state_shm_;
 
   // |*this| is owned by |*channel_| and so is always outlived by it, so using a
   // raw pointer is ok.
   GpuChannelHost* channel_;
   int route_id_;
   unsigned int flush_count_;
   int32 last_put_offset_;
+  int32 last_barrier_put_offset_;
 
   base::Closure channel_error_callback_;
 
   MemoryAllocationChangedCallback memory_allocation_changed_callback_;
 
   GpuConsoleMessageCallback console_message_callback_;
 
   // Tasks to be invoked in SignalSyncPoint responses.
   uint32 next_signal_id_;
   SignalTaskMap signal_tasks_;
 
   // Local cache of id to gpu memory buffer mapping.
   GpuMemoryBufferMap gpu_memory_buffers_;
 
   gpu::Capabilities capabilities_;
 
   std::vector<ui::LatencyInfo> latency_info_;
 
   SwapBuffersCompletionCallback swap_buffers_completion_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferProxyImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_IMPL_H_