FilePath: remove some functions that aren't really used.

base/file_path.h

 // Copyright (c) 2011 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.
 
 // FilePath is a container for pathnames stored in a platform's native string
 // type, providing containers for manipulation in according with the
 // platform's conventions for pathnames.  It supports the following path
 // types:
 //
 //                   POSIX            Windows
@@ skipping 294 matching lines @@
   //   try to convert the API into using FilePath.
   // - Am I interacting with OS-native calls?  Then use value() to get at an
   //   OS-native string format.
   // - Am I using well-known file names, like "config.ini"?  Then use the
   //   ASCII functions (we require paths to always be supersets of ASCII).
   // - Am I displaying a string to the user in some UI?  Then use the
   //   LossyDisplayName() function, but keep in mind that you can't
   //   ever use the result of that again as a path.
   static FilePath FromWStringHack(const std::wstring& wstring);
 
-  // Static helper method to write a StringType to a pickle.
-  static void WriteStringTypeToPickle(Pickle* pickle,
-                                      const FilePath::StringType& path);
-  static bool ReadStringTypeFromPickle(Pickle* pickle, void** iter,
-                                       FilePath::StringType* path);
-
   void WriteToPickle(Pickle* pickle);
   bool ReadFromPickle(Pickle* pickle, void** iter);
 
 #if defined(FILE_PATH_USES_WIN_SEPARATORS)
   // Normalize all path separators to backslash.
   FilePath NormalizeWindowsPathSeparators() const;
 #endif
 
   // Compare two strings in the same way the file system does.
   // Note that these always ignore case, even on file systems that are case-
@@ skipping 70 matching lines @@
 namespace stdext {
 
 inline size_t hash_value(const FilePath& f) {
   return hash_value(f.value());
 }
 
 }  // namespace stdext
 #endif  // COMPILER
 
 #endif  // BASE_FILE_PATH_H_