Move file_util to base/files/ directory.

base/nix/xdg_util.cc

 // 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.
 
 #include "base/nix/xdg_util.h"
 
 #include <string>
 
 #include "base/base_paths.h"
 #include "base/environment.h"
-#include "base/file_util.h"
 #include "base/files/file_path.h"
+#include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/third_party/xdg_user_dirs/xdg_user_dir_lookup.h"
 
 namespace {
 
 // The KDE session version environment variable used in KDE 4.
 const char kKDE4SessionEnvVar[] = "KDE_SESSION_VERSION";
 
 }  // namespace
 
@@ skipping 88 matching lines @@
   }
   return NULL;
 }
 
 const char* GetDesktopEnvironmentName(Environment* env) {
   return GetDesktopEnvironmentName(GetDesktopEnvironment(env));
 }
 
 }  // namespace nix
 }  // namespace base