gpu: Compositor management of GpuMemoryBuffer instances.

cc/resources/gpu_memory_buffer_manager.h

+// Copyright 2014 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 CC_RESOURCES_GPU_MEMORY_BUFFER_MANAGER_H_
+#define CC_RESOURCES_GPU_MEMORY_BUFFER_MANAGER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+#include "ui/gfx/size.h"
+
+namespace cc {
+
+class GpuMemoryBufferManager {
+ public:
+  // Allocates a GpuMemoryBuffer that can be shared with another process.
+  virtual scoped_ptr<gfx::GpuMemoryBuffer> AllocateGpuMemoryBuffer(
+      const gfx::Size& size,
+      gfx::GpuMemoryBuffer::Format format,
+      gfx::GpuMemoryBuffer::Usage usage) = 0;
+
+  // Returns a GpuMemoryBuffer instance given a ClientBuffer. Returns NULL on
+  // failure.
+  virtual gfx::GpuMemoryBuffer* GpuMemoryBufferFromClientBuffer(
+      ClientBuffer buffer) = 0;
+
+ protected:
+  virtual ~GpuMemoryBufferManager() {}
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_GPU_MEMORY_BUFFER_MANAGER_H_