Pull string_util for posix too

base/strings/string_util_win.h

 // Copyright 2013 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_STRINGS_STRING_UTIL_WIN_H_
 #define BASE_STRINGS_STRING_UTIL_WIN_H_
 
-#include <stdio.h>
 #include <string.h>
-#include <wchar.h>
-
-#include "base/strings/string16.h"
 
 namespace base {
 
 // Chromium code style is to not use malloc'd strings; this is only for use
 // for interaction with APIs that require it.
 inline char* strdup(const char* str) {
   return _strdup(str);
 }
 
 inline int strcasecmp(const char* s1, const char* s2) {
   return _stricmp(s1, s2);
 }
 
 inline int strncasecmp(const char* s1, const char* s2, size_t count) {
   return _strnicmp(s1, s2, count);
 }
 
-inline int strncmp16(const char16* s1, const char16* s2, size_t count) {
-  return wcsncmp(s1, s2, count);
-}
-
 }  // namespace base
 
 #endif  // BASE_STRINGS_STRING_UTIL_WIN_H_