gpu: Add GpuMemoryBufferFactory interface.

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 gpu {
+class GpuMemoryBuffer;
+
+class GPU_EXPORT GpuMemoryBufferFactory {
+ public:
+  virtual gpu::GpuMemoryBuffer* CreateGpuMemoryBuffer(
+      size_t width,
+      size_t height,
+      unsigned internalformat) = 0;
+
+ protected:
+  virtual ~GpuMemoryBufferFactory() {}
+};
+
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_CLIENT_GPU_MEMORY_BUFFER_FACTORY_H_