Remove a deprecated wstring ToLower function.

app/l10n_util.cc

 // 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.
 
 #include "app/l10n_util.h"
 
 #include <cstdlib>
 
 #include "app/app_paths.h"
 #include "app/l10n_util_collator.h"
@@ skipping 702 matching lines @@
       // Found a valid break point.
       index = char_iterator.getIndex();
     } else {
       // String has leading whitespace, return the elide string.
       return kElideString;
     }
   }
   return string.substr(0, index) + kElideString;
 }
 
-#if defined(WCHAR_T_IS_UTF32)
-std::wstring ToLower(const std::wstring& string) {
-  return UTF16ToWide(ToLower(WideToUTF16(string)));
-}
-#endif  // defined(WCHAR_T_IS_UTF32)
-
 string16 ToLower(const string16& string) {
   icu::UnicodeString lower_u_str(
       icu::UnicodeString(string.c_str()).toLower(icu::Locale::getDefault()));
   string16 result;
   lower_u_str.extract(0, lower_u_str.length(),
                       WriteInto(&result, lower_u_str.length() + 1));
   return result;
 }
 
 string16 ToUpper(const string16& string) {
@@ skipping 113 matching lines @@
   for (size_t i = 0; i < arraysize(kAcceptLanguageList); ++i) {
     if (!IsLocaleNameTranslated(kAcceptLanguageList[i], display_locale))
       // TODO(jungshik) : Put them at the of the list with language codes
       // enclosed by brackets instead of skipping.
         continue;
     locale_codes->push_back(kAcceptLanguageList[i]);
   }
 }
 
 }  // namespace l10n_util