Implement some missing file util functions.

base/file_util.h

 // Copyright (c) 2006-2008 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.
 
 // This file contains utility functions for dealing with the local
 // filesystem.
 
 #ifndef BASE_FILE_UTIL_H_
 #define BASE_FILE_UTIL_H_
 
@@ skipping 294 matching lines @@
 // Writes the given buffer into the file, overwriting any data that was
 // previously there.  Returns the number of bytes written, or -1 on error.
 int WriteFile(const std::wstring& filename, const char* data, int size);
 
 // Gets the current working directory for the process.
 bool GetCurrentDirectory(FilePath* path);
 // Deprecated temporary compatibility function.
 bool GetCurrentDirectory(std::wstring* path);
 
 // Sets the current working directory for the process.
+bool SetCurrentDirectory(const FilePath& path);
+// Deprecated temporary compatibility function.
 bool SetCurrentDirectory(const std::wstring& current_directory);
 
 // A class for enumerating the files in a provided path. The order of the
 // results is not guaranteed.
 //
 // DO NOT USE FROM THE MAIN THREAD of your application unless it is a test
 // program where latency does not matter. This class is blocking.
 class FileEnumerator {
  public:
   enum FILE_TYPE {
@@ skipping 60 matching lines @@
 
 // Renames a file using the SHFileOperation API to ensure that the target file
 // gets the correct default security descriptor in the new path.
 bool RenameFileAndResetSecurityDescriptor(
     const std::wstring& source_file_path,
     const std::wstring& target_file_path);
 
 }  // namespace file_util
 
 #endif  // BASE_FILE_UTIL_H_