Upstream android string implementation etc.

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 362 matching lines @@
 #define PRFilePath "s"
 #define PRFilePathLiteral "%s"
 #elif defined(OS_WIN)
 #define FILE_PATH_LITERAL(x) L ## x
 #define PRFilePath "ls"
 #define PRFilePathLiteral L"%ls"
 #endif  // OS_WIN
 
 // Provide a hash function so that hash_sets and maps can contain FilePath
 // objects.
+namespace BASE_HASH_NAMESPACE {
 #if defined(COMPILER_GCC)
-namespace __gnu_cxx {
 
 template<>
 struct hash<FilePath> {
   size_t operator()(const FilePath& f) const {
     return hash<FilePath::StringType>()(f.value());
   }
 };
 
-}  // namespace __gnu_cxx
 #elif defined(COMPILER_MSVC)
-namespace stdext {
 
 inline size_t hash_value(const FilePath& f) {
   return hash_value(f.value());
 }
 
-}  // namespace stdext
 #endif  // COMPILER
 
+}  // namespace BASE_HASH_NAMESPACE
+
 #endif  // BASE_FILE_PATH_H_