Remove a deprecated wstring ToLower function.

chrome/browser/search_engines/template_url.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/search_engines/template_url.h"
 
 #include "app/l10n_util.h"
 #include "base/i18n/icu_string_conversions.h"
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
@@ skipping 543 matching lines @@
 
 void TemplateURL::SetURL(const std::string& url,
                          int index_offset,
                          int page_offset) {
   url_.Set(url, index_offset, page_offset);
 }
 
 void TemplateURL::set_keyword(const std::wstring& keyword) {
   // Case sensitive keyword matching is confusing. As such, we force all
   // keywords to be lower case.
-  keyword_ = l10n_util::ToLower(keyword);
+  keyword_ = UTF16ToWide(l10n_util::ToLower(WideToUTF16(keyword)));
   autogenerate_keyword_ = false;
 }
 
 const std::wstring& TemplateURL::keyword() const {
   if (autogenerate_keyword_ && !keyword_generated_) {
     // Generate a keyword and cache it.
     keyword_ = TemplateURLModel::GenerateKeyword(
         TemplateURLModel::GenerateSearchURL(this).GetWithEmptyPath(), true);
     keyword_generated_ = true;
   }
@@ skipping 45 matching lines @@
 }
 
 std::string TemplateURL::GetExtensionId() const {
   DCHECK(IsExtensionKeyword());
   return GURL(url_.url()).host();
 }
 
 bool TemplateURL::IsExtensionKeyword() const {
   return GURL(url_.url()).SchemeIs(chrome::kExtensionScheme);
 }