PpapiCommandBufferProxy implements CommandBufferProxy.

content/common/gpu/client/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 CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_H_
-#define CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_H_
-#pragma once
-
-#if defined(ENABLE_GPU)
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/scoped_ptr.h"
-#include "content/common/gpu/client/gpu_video_decode_accelerator_host.h"
-#include "gpu/command_buffer/common/command_buffer.h"
-#include "gpu/command_buffer/common/command_buffer_shared.h"
-
-struct GpuMemoryAllocationForRenderer;
-
-// Client side proxy that forwards messages synchronously to a
-// CommandBufferStub.
-class CommandBufferProxy : public gpu::CommandBuffer {
- public:
-  typedef base::Callback<void(
-      const std::string& msg, int id)> GpuConsoleMessageCallback;
-
-  CommandBufferProxy() { }
-
-  virtual ~CommandBufferProxy() { }
-
-  virtual int GetRouteID() const = 0;
-
-  // Invoke the task when the channel has been flushed. Takes care of deleting
-  // the task whether the echo succeeds or not.
-  virtual bool Echo(const base::Closure& callback) = 0;
-
-  // Sends an IPC message with the new state of surface visibility.
-  virtual bool SetSurfaceVisible(bool visible) = 0;
-
-  virtual bool DiscardBackbuffer() = 0;
-  virtual bool EnsureBackbuffer() = 0;
-
-  // Register a callback to invoke whenever we recieve a new memory allocation.
-  virtual void SetMemoryAllocationChangedCallback(
-      const base::Callback<void(const GpuMemoryAllocationForRenderer&)>&
-          callback) = 0;
-
-  // Reparent a command buffer. TODO(apatrick): going forward, the notion of
-  // the parent / child relationship between command buffers is going away in
-  // favor of the notion of surfaces that can be drawn to in one command buffer
-  // and bound as a texture in any other.
-  virtual bool SetParent(CommandBufferProxy* parent_command_buffer,
-                         uint32 parent_texture_id) = 0;
-
-  virtual void SetChannelErrorCallback(const base::Closure& callback) = 0;
-
-  // Set a task that will be invoked the next time the window becomes invalid
-  // and needs to be repainted. Takes ownership of task.
-  virtual void SetNotifyRepaintTask(const base::Closure& callback) = 0;
-
-  // Sends an IPC message to create a GpuVideoDecodeAccelerator. Creates and
-  // returns a pointer to a GpuVideoDecodeAcceleratorHost.
-  // Returns NULL on failure to create the GpuVideoDecodeAcceleratorHost.
-  // Note that the GpuVideoDecodeAccelerator may still fail to be created in
-  // the GPU process, even if this returns non-NULL. In this case the client is
-  // notified of an error later.
-  virtual scoped_refptr<GpuVideoDecodeAcceleratorHost> CreateVideoDecoder(
-      media::VideoCodecProfile profile,
-      media::VideoDecodeAccelerator::Client* client) = 0;
-
-  virtual void SetOnConsoleMessageCallback(
-      const GpuConsoleMessageCallback& callback) = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CommandBufferProxy);
-};
-
-#endif  // ENABLE_GPU
-
-#endif  // CONTENT_COMMON_GPU_CLIENT_COMMAND_BUFFER_PROXY_H_