Pull gpu service/client shared memory buffer code to GpuMemoryBufferSupport

gpu/ipc/common/gpu_memory_buffer_support.h

+// Copyright 2016 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_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_
+#define GPU_IPC_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_
+
+#include "gpu/gpu_export.h"
+#include "ui/gfx/buffer_types.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+
+namespace gpu {
+
+// Returns the native GPU memory buffer factory type. Returns EMPTY_BUFFER
+// type if native buffers are not supported.
+GPU_EXPORT gfx::GpuMemoryBufferType GetNativeGpuMemoryBufferType();
+
+// Returns whether the provided buffer format is supported.
+GPU_EXPORT bool IsNativeGpuMemoryBufferConfigurationSupported(
+    gfx::BufferFormat format,
+    gfx::BufferUsage usage);
+
+}  // namespace gpu
+
+#endif  // GPU_IPC_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_