Move file_util_proxy to base/files.

base/files/file_util_proxy.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 BASE_FILE_UTIL_PROXY_H_
-#define BASE_FILE_UTIL_PROXY_H_
+#ifndef BASE_FILES_FILE_UTIL_PROXY_H_
+#define BASE_FILES_FILE_UTIL_PROXY_H_
 
 #include "base/base_export.h"
 #include "base/callback_forward.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/platform_file.h"
 
 namespace tracked_objects {
 class Location;
@@ skipping 184 matching lines @@
       const CloseTask& close_task,
       PlatformFile,
       const StatusCallback& callback);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(FileUtilProxy);
 };
 
 }  // namespace base
 
-#endif  // BASE_FILE_UTIL_PROXY_H_
+#endif  // BASE_FILES_FILE_UTIL_PROXY_H_