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diff --git a/gpu/ipc/command_buffer_proxy.h b/gpu/ipc/command_buffer_proxy.h
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+++ b/gpu/ipc/command_buffer_proxy.h
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+// 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_IPC_COMMAND_BUFFER_PROXY_H_
+#define GPU_IPC_COMMAND_BUFFER_PROXY_H_
+#pragma once
+
+#include <string>
+
+#include "base/callback.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 GPU_EXPORT 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;
+
+  virtual void SetOnConsoleMessageCallback(
+      const GpuConsoleMessageCallback& callback) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(CommandBufferProxy);
+};
+
+#endif  // GPU_IPC_COMMAND_BUFFER_PROXY_H_