The UI language rather than the locale is now used to pick Chrome's language ...

base/i18n/rtl.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 "base/i18n/rtl.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 26 matching lines @@
 }
 
 }  // namespace
 
 namespace base {
 namespace i18n {
 
 // Represents the locale-specific ICU text direction.
 static TextDirection g_icu_text_direction = UNKNOWN_DIRECTION;
 
-#if defined(OS_WIN)
-void GetLanguageAndRegionFromOS(std::string* lang, std::string* region) {
-  // Later we may have to change this to be OS-dependent so that
-  // it's not affected by ICU's default locale. It's all right
-  // to do this way because SetICUDefaultLocale is internal
-  // to this file and we know that it's not yet called when this function
-  // is called.
-  const icu::Locale& locale = icu::Locale::getDefault();
-  const char* language = locale.getLanguage();
-  const char* country = locale.getCountry();
-  DCHECK(language);
-  *lang = language;
-  *region = country;
-}
-#endif
-
 // Convert the ICU default locale to a string.
 std::string GetConfiguredLocale() {
   return GetLocaleString(icu::Locale::getDefault());
 }
 
 // Convert the ICU canonicalized locale to a string.
 std::string GetCanonicalLocale(const char* locale) {
   return GetLocaleString(icu::Locale::createCanonical(locale));
 }
 
@@ skipping 248 matching lines @@
       begin == kRightToLeftOverride)
     ++begin_index;
   size_t end_index = text.length() - 1;
   if (text[end_index] == kPopDirectionalFormatting)
     --end_index;
   return text.substr(begin_index, end_index - begin_index + 1);
 }
 
 }  // namespace i18n
 }  // namespace base