Add OrderingBarrierCHROMIUM API.

gpu/command_buffer/service/command_buffer_service.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 GPU_COMMAND_BUFFER_SERVICE_COMMAND_BUFFER_SERVICE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_COMMAND_BUFFER_SERVICE_H_
 
 #include "base/callback.h"
 #include "base/memory/shared_memory.h"
 #include "gpu/command_buffer/common/command_buffer.h"
@@ skipping 34 matching lines @@
   typedef base::Callback<bool(int32)> GetBufferChangedCallback;
   explicit CommandBufferService(
       TransferBufferManagerInterface* transfer_buffer_manager);
   ~CommandBufferService() 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 transfer_buffer_id) override;
   scoped_refptr<Buffer> CreateTransferBuffer(size_t size, int32* id) override;
   void DestroyTransferBuffer(int32 id) override;
 
   // CommandBufferServiceBase implementation:
   void SetGetOffset(int32 get_offset) override;
   scoped_refptr<Buffer> GetTransferBuffer(int32 id) override;
   void SetToken(int32 token) override;
@@ skipping 41 matching lines @@
   uint32 generation_;
   error::Error error_;
   error::ContextLostReason context_lost_reason_;
 
   DISALLOW_COPY_AND_ASSIGN(CommandBufferService);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_COMMAND_BUFFER_SERVICE_H_