Cleanup: Deprecate wstring version of file_util::CopyDirectory().

base/file_util.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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/file_util.h"
 
 #if defined(OS_WIN)
 #include <io.h>
 #endif
 #include <stdio.h>
 
@@ skipping 375 matching lines @@
   if (!path) {
     NOTREACHED();
     return;  // Don't crash in this function in release builds.
   }
 
   if (!EndsWithSeparator(FilePath(*path)))
     path->push_back(FilePath::kSeparators[0]);
   path->append(new_ending);
 }
 
-bool CopyDirectory(const std::wstring& from_path, const std::wstring& to_path,
-                   bool recursive) {
-  return CopyDirectory(FilePath::FromWStringHack(from_path),
-                       FilePath::FromWStringHack(to_path),
-                       recursive);
-}
-bool Delete(const std::wstring& path, bool recursive) {
-  return Delete(FilePath::FromWStringHack(path), recursive);
-}
-std::wstring GetFileExtensionFromPath(const std::wstring& path) {
-  std::wstring file_name = FilePath(path).BaseName().value();
-  const std::wstring::size_type last_dot = file_name.rfind(kExtensionSeparator);
-  return std::wstring(last_dot == std::wstring::npos ? L""
-                                                     : file_name, last_dot + 1);
-}
 FILE* OpenFile(const std::wstring& filename, const char* mode) {
   return OpenFile(FilePath::FromWStringHack(filename), mode);
 }
 int ReadFile(const std::wstring& filename, char* data, int size) {
   return ReadFile(FilePath::FromWStringHack(filename), data, size);
 }
 int WriteFile(const std::wstring& filename, const char* data, int size) {
   return WriteFile(FilePath::FromWStringHack(filename), data, size);
 }
 #endif  // OS_WIN
 
 ///////////////////////////////////////////////
 // FileEnumerator
 //
 // Note: the main logic is in file_util_<platform>.cc
 
 bool FileEnumerator::ShouldSkip(const FilePath& path) {
   FilePath::StringType basename = path.BaseName().value();
   return IsDot(path) || (IsDotDot(path) && !(INCLUDE_DOT_DOT & file_type_));
 }
 
 }  // namespace