Add a method for normalizing path separators on Windows.

base/file_path.h

 // Copyright (c) 2010 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 286 matching lines @@
 
   // 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-
   // sensitive. If case-sensitive comparison is ever needed, add corresponding
   // methods here.
   // The methods are written as a static method so that they can also be used
   // on parts of a file path, e.g., just the extension.
   // CompareIgnoreCase() returns -1, 0 or 1 for less-than, equal-to and
   // greater-than respectively.
   static int CompareIgnoreCase(const StringType& string1,
                                const StringType& string2);
@@ skipping 57 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_