Deleted OS_WIN and all Windows specific files from base.

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 <stdarg.h>
-#include <stdio.h>
-#include <string.h>
-#include <wchar.h>
-
-#include "base/logging.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);
-}
-
-inline int vsnprintf(char* buffer, size_t size,
-                     const char* format, va_list arguments) {
-  int length = vsnprintf_s(buffer, size, size - 1, format, arguments);
-  if (length < 0)
-    return _vscprintf(format, arguments);
-  return length;
-}
-
-inline int vswprintf(wchar_t* buffer, size_t size,
-                     const wchar_t* format, va_list arguments) {
-  DCHECK(IsWprintfFormatPortable(format));
-
-  int length = _vsnwprintf_s(buffer, size, size - 1, format, arguments);
-  if (length < 0)
-    return _vscwprintf(format, arguments);
-  return length;
-}
-
-}  // namespace base
-
-#endif  // BASE_STRINGS_STRING_UTIL_WIN_H_