Move file_util::Delete to the base namespace

chrome/common/extensions/extension_file_util.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 CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_
 
 #include <string>
 #include <map>
 
@@ skipping 125 matching lines @@
                                               const base::FilePath& root);
 
 // Returns a path to a temporary directory for unpacking an extension that will
 // be installed into |extensions_dir|. Creates the directory if necessary.
 // The directory will be on the same file system as |extensions_dir| so
 // that the extension directory can be efficiently renamed into place. Returns
 // an empty file path on failure.
 base::FilePath GetInstallTempDir(const base::FilePath& extensions_dir);
 
 // Helper function to delete files. This is used to avoid ugly casts which
-// would be necessary with PostMessage since file_util::Delete is overloaded.
+// would be necessary with PostMessage since base::Delete is overloaded.
 // TODO(skerner): Make a version of Delete that is not overloaded in file_util.
 void DeleteFile(const base::FilePath& path, bool recursive);
 
 }  // namespace extension_file_util
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_FILE_UTIL_H_