Pull gpu CmdBuf service/client shared GpuMemoryBuffer code to common

gpu/command_buffer/common/gpu_memory_buffer_support.h

Index: gpu/command_buffer/common/gpu_memory_buffer_support.h
diff --git a/gpu/command_buffer/common/gpu_memory_buffer_support.h b/gpu/command_buffer/common/gpu_memory_buffer_support.h
new file mode 100644
index 0000000000000000000000000000000000000000..7539de3098ef15c41e7a4ac22440b66019f8b8e8
--- /dev/null
+++ b/gpu/command_buffer/common/gpu_memory_buffer_support.h
@@ -0,0 +1,39 @@
+// 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_COMMAND_BUFFER_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_
+#define GPU_COMMAND_BUFFER_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_
+
+#include "gpu/gpu_export.h"
+#include "ui/gfx/buffer_types.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+
+namespace gpu {
+
+struct Capabilities;
+
+// Returns a valid GpuMemoryBuffer format given a valid internalformat as
+// defined by CHROMIUM_gpu_memory_buffer_image.
+GPU_EXPORT gfx::BufferFormat DefaultBufferFormatForImageFormat(
+    unsigned internalformat);
+
+// Returns true if |internalformat| is compatible with |format|.
+GPU_EXPORT bool IsImageFormatCompatibleWithGpuMemoryBufferFormat(
+    unsigned internalformat,
+    gfx::BufferFormat format);
+
+// Returns true if |format| is supported by |capabilities|.
+GPU_EXPORT bool IsGpuMemoryBufferFormatSupported(
+    gfx::BufferFormat format,
+    const Capabilities& capabilities);
+
+// Returns true if |size| is valid for |format|.
+GPU_EXPORT bool IsImageSizeValidForGpuMemoryBufferFormat(
+    const gfx::Size& size,
+    gfx::BufferFormat format);
+
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_COMMON_GPU_MEMORY_BUFFER_SUPPORT_H_