Fix clang build by moving ToLowerASCII into base namespace.

chrome/browser/chromeos/input_method/input_method_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 "chrome/browser/chromeos/input_method/input_method_util.h"
 
 #include <algorithm>
 #include <map>
 #include <utility>
 
@@ skipping 354 matching lines @@
 
 std::string NormalizeLanguageCode(
     const std::string& language_code) {
   // Some ibus engines return locale codes like "zh_CN" as language codes.
   // Normalize these to like "zh-CN".
   if (language_code.size() >= 5 && language_code[2] == '_') {
     std::string copied_language_code = language_code;
     copied_language_code[2] = '-';
     // Downcase the language code part.
     for (size_t i = 0; i < 2; ++i) {
-      copied_language_code[i] = ToLowerASCII(copied_language_code[i]);
+      copied_language_code[i] = base::ToLowerASCII(copied_language_code[i]);
     }
     // Upcase the country code part.
     for (size_t i = 3; i < copied_language_code.size(); ++i) {
       copied_language_code[i] = ToUpperASCII(copied_language_code[i]);
     }
     return copied_language_code;
   }
   // We only handle three-letter codes from here.
   if (language_code.size() != 3) {
     return language_code;
@@ skipping 205 matching lines @@
     library->ChangeInputMethod(initial_input_method_id);
   }
 }
 
 void OnLocaleChanged() {
   Singleton<IdMaps>::get()->ReloadMaps();
 }
 
 }  // namespace input_method
 }  // namespace chromeos