Move GPU device/driver info related code from content to gpu.

gpu/config/gpu_switching_option.h

 // Copyright (c) 2012 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 CONTENT_PUBLIC_COMMON_GPU_SWITCHING_OPTION_H_
-#define CONTENT_PUBLIC_COMMON_GPU_SWITCHING_OPTION_H_
+#ifndef GPU_CONFIG_GPU_SWITCHING_OPTION_H_
+#define GPU_CONFIG_GPU_SWITCHING_OPTION_H_
 
-#include "build/build_config.h"
-#include "content/common/content_export.h"
+//#include "build/build_config.h"
 
-namespace content {
+namespace gpu {
 
 enum GpuSwitchingOption {
   GPU_SWITCHING_OPTION_AUTOMATIC,
   GPU_SWITCHING_OPTION_FORCE_INTEGRATED,
   GPU_SWITCHING_OPTION_FORCE_DISCRETE,
   GPU_SWITCHING_OPTION_UNKNOWN
 };
 
-}  // namespace content
+}  // namespace gpu
 
-#endif  // CONTENT_PUBLIC_COMMON_GPU_SWITCHING_OPTION_H_
+#endif  // GPU_CONFIG_GPU_SWITCHING_OPTION_H_