Added Pepper 3D render context that instantiates the GPU plugin....

gpu/command_buffer/service/cmd_buffer_engine.h

 // Copyright (c) 2009 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.
 
 // This file defines the CommandBufferEngine class, providing the main loop for
 // the service, exposing the RPC API, managing the command parser.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_CMD_BUFFER_ENGINE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_CMD_BUFFER_ENGINE_H_
 
 #include "base/basictypes.h"
+#include "gpu/command_buffer/common/buffer.h"
 
 namespace gpu {
 
 class CommandBufferEngine {
  public:
   CommandBufferEngine() {
   }
 
   virtual ~CommandBufferEngine() {
   }
 
-  // Gets the base address of a registered shared memory buffer.
+  // Gets the base address and size of a registered shared memory buffer.
   // Parameters:
   //   shm_id: the identifier for the shared memory buffer.
-  virtual void *GetSharedMemoryAddress(int32 shm_id) = 0;
-
-  // Gets the size of a registered shared memory buffer.
-  // Parameters:
-  //   shm_id: the identifier for the shared memory buffer.
-  virtual size_t GetSharedMemorySize(int32 shm_id) = 0;
+  virtual Buffer GetSharedMemoryBuffer(int32 shm_id) = 0;
 
   // Sets the token value.
   virtual void set_token(int32 token) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(CommandBufferEngine);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CMD_BUFFER_ENGINE_H_