Add DIRECT_COMPOSITION GpuMemoryBuffer type.

gpu/ipc/client/gpu_memory_buffer_impl_direct_composition.h

+// Copyright 2017 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_CLIENT_GPU_MEMORY_BUFFER_IMPL_DIRECT_COMPOSITION_H_
+#define GPU_IPC_CLIENT_GPU_MEMORY_BUFFER_IMPL_DIRECT_COMPOSITION_H_
+
+#include "gpu/gpu_export.h"
+#include "gpu/ipc/client/gpu_memory_buffer_impl.h"
+
+namespace gpu {
+
+// DirectComposition GpuMemoryBuffers can't be mapped from the client, so this
+// class just holds on to the handle so the GPU process can refer to it.
+class GPU_EXPORT GpuMemoryBufferImplDirectComposition
+    : public GpuMemoryBufferImpl {
+ public:
+  GpuMemoryBufferImplDirectComposition(const gfx::Size& size,
+                                       gfx::GpuMemoryBufferHandle handle,
+                                       gfx::BufferFormat format,
+                                       const DestructionCallback& callback);
+
+  ~GpuMemoryBufferImplDirectComposition() override;
+
+  bool Map() override;
+  void* memory(size_t plane) override;
+  void Unmap() override;
+  int stride(size_t plane) const override;
+  void SetColorSpaceForScanout(const gfx::ColorSpace& color_space) override;
+  gfx::GpuMemoryBufferHandle GetHandle() const override;
+
+ private:
+  gfx::GpuMemoryBufferHandle handle_;
+};
+
+}  // namespace gpu
+
+#endif  // GPU_IPC_CLIENT_GPU_MEMORY_BUFFER_IMPL_DIRECT_COMPOSITION_H_