Add DIRECT_COMPOSITION GpuMemoryBuffer type.

gpu/ipc/client/gpu_memory_buffer_impl_direct_composition.cc

+// 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.
+
+#include "gpu/ipc/client/gpu_memory_buffer_impl_direct_composition.h"
+
+namespace gpu {
+
+GpuMemoryBufferImplDirectComposition::GpuMemoryBufferImplDirectComposition(
+    const gfx::Size& size,
+    gfx::GpuMemoryBufferHandle handle,
+    gfx::BufferFormat format,
+    const DestructionCallback& callback)
+    : GpuMemoryBufferImpl(handle.id, size, format, callback), handle_(handle) {}
+GpuMemoryBufferImplDirectComposition::~GpuMemoryBufferImplDirectComposition() {}
+
+bool GpuMemoryBufferImplDirectComposition::Map() {
+  return false;
+}
+
+void* GpuMemoryBufferImplDirectComposition::memory(size_t plane) {
+  return nullptr;
+}
+
+void GpuMemoryBufferImplDirectComposition::Unmap() {}
+
+int GpuMemoryBufferImplDirectComposition::stride(size_t plane) const {
+  return 0;
+}
+
+void GpuMemoryBufferImplDirectComposition::SetColorSpaceForScanout(
+    const gfx::ColorSpace& color_space) {}
+
+gfx::GpuMemoryBufferHandle GpuMemoryBufferImplDirectComposition::GetHandle()
+    const {
+  return handle_;
+}
+}  // namespace gpu