gpu: Remove Create/DeleteImage IPC by adding an X11_PIXMAP_BUFFER GpuMemoryBuffer type.

gpu/command_buffer/client/gpu_memory_buffer_factory.h

-// Copyright 2013 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_CLIENT_GPU_MEMORY_FACTORY_BUFFER_H_
-#define GPU_COMMAND_BUFFER_CLIENT_GPU_MEMORY_FACTORY_BUFFER_H_
-
-#include "gpu/gpu_export.h"
-
-namespace gfx {
-class GpuMemoryBuffer;
-}
-
-namespace gpu {
-
-class GPU_EXPORT GpuMemoryBufferFactory {
- public:
-  virtual gfx::GpuMemoryBuffer* CreateGpuMemoryBuffer(size_t width,
-                                                      size_t height,
-                                                      unsigned internalformat,
-                                                      unsigned usage) = 0;
-
- protected:
-  virtual ~GpuMemoryBufferFactory() {}
-};
-
-}  // namespace gpu
-
-#endif  // GPU_COMMAND_BUFFER_CLIENT_GPU_MEMORY_BUFFER_FACTORY_H_