Move stack_container and linked_list to the new containers subdirectory.

base/string16.h

 // 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.
 
 #ifndef BASE_STRING16_H_
 #define BASE_STRING16_H_
 
 // WHAT:
 // A version of std::basic_string that provides 2-byte characters even when
 // wchar_t is not implemented as a 2-byte type. You can access this class as
@@ skipping 19 matching lines @@
 #include <string>
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 
 #if defined(WCHAR_T_IS_UTF16)
 
 typedef wchar_t char16;
 typedef std::wstring string16;
 
+namespace base {
+typedef std::char_traits<wchar_t> string16_char_traits;
+}
+
 #elif defined(WCHAR_T_IS_UTF32)
 
 typedef uint16 char16;
 
 namespace base {
 
 // char16 versions of the functions required by string16_char_traits; these
 // are based on the wide character functions of similar names ("w" or "wcs"
 // instead of "c16").
 BASE_EXPORT int c16memcmp(const char16* s1, const char16* s2, size_t n);
@@ skipping 122 matching lines @@
 BASE_EXPORT extern std::ostream& operator<<(std::ostream& out,
                                             const string16& str);
 
 // This is required by googletest to print a readable output on test failures.
 BASE_EXPORT extern void PrintTo(const string16& str, std::ostream* out);
 }
 
 #endif  // WCHAR_T_IS_UTF32
 
 #endif  // BASE_STRING16_H_