Implement some missing file util functions.

base/file_util_win.cc

 // 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.
 
 #include "base/file_util.h"
 
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
 #include <time.h>
@@ skipping 477 matching lines @@
 }
 
 FILE* OpenFile(const std::string& filename, const char* mode) {
   FILE* file;
   if (fopen_s(&file, filename.c_str(), mode) != 0) {
     return NULL;
   }
   return file;
 }
 
-FILE* OpenFile(const std::wstring& filename, const char* mode) {
-  return OpenFile(FilePath(filename), mode);
-}
-
 int ReadFile(const std::wstring& filename, char* data, int size) {
   ScopedHandle file(CreateFile(filename.c_str(),
                                GENERIC_READ,
                                FILE_SHARE_READ | FILE_SHARE_WRITE,
                                NULL,
                                OPEN_EXISTING,
                                FILE_FLAG_SEQUENTIAL_SCAN,
                                NULL));
   if (file == INVALID_HANDLE_VALUE)
     return -1;
@@ skipping 75 matching lines @@
   // TODO(evanm): the old behavior of this function was to always strip the
   // trailing slash.  We duplicate this here, but it shouldn't be necessary
   // when everyone is using the appropriate FilePath APIs.
   std::wstring dir_str(system_buffer);
   file_util::TrimTrailingSeparator(&dir_str);
   *dir = FilePath(dir_str);
   return true;
 }
 
 // Sets the current working directory for the process.
-bool SetCurrentDirectory(const std::wstring& current_directory) {
-  BOOL ret = ::SetCurrentDirectory(current_directory.c_str());
-  return (ret ? true : false);
+bool SetCurrentDirectory(const FilePath& directory) {
+  BOOL ret = ::SetCurrentDirectory(directory.value().c_str());
+  return ret != 0;
 }
 
 ///////////////////////////////////////////////
 
 
 FileEnumerator::FileEnumerator(const std::wstring& root_path,
                                bool recursive,
                                FileEnumerator::FILE_TYPE file_type)
     : recursive_(recursive),
       file_type_(file_type),
@@ skipping 76 matching lines @@
       // it to pending_paths_ so we scan it after we finish scanning this
       // directory.
       pending_paths_.push(cur_file);
     }
     return (file_type_ & FileEnumerator::DIRECTORIES) ? cur_file : Next();
   }
   return (file_type_ & FileEnumerator::FILES) ? cur_file : Next();
 }
 
 }  // namespace file_util