Replace ToLower calls to the new format

chrome/browser/search/hotword_service.cc

 // 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.
 
 #include "chrome/browser/search/hotword_service.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/i18n/case_conversion.h"
@@ skipping 250 matching lines @@
   ~HotwordNotificationDelegate() override {}
 
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(HotwordNotificationDelegate);
 };
 
 // static
 bool HotwordService::DoesHotwordSupportLanguage(Profile* profile) {
   std::string normalized_locale =
-      l10n_util::NormalizeLocale(GetCurrentLocale(profile));
-  base::StringToLowerASCII(&normalized_locale);
+      base::ToLowerASCII(l10n_util::NormalizeLocale(GetCurrentLocale(profile)));
 
   // For M43, we are limiting always-on to en_us only.
   // TODO(kcarattini): Remove this once
   // https://code.google.com/p/chrome-os-partner/issues/detail?id=39227
   // is fixed.
   if (HotwordServiceFactory::IsAlwaysOnAvailable())
     return normalized_locale == "en_us";
 
   for (size_t i = 0; i < arraysize(kSupportedLocales); i++) {
     if (normalized_locale == kSupportedLocales[i])
@@ skipping 593 matching lines @@
   // Only support multiple profiles and profile switching in ChromeOS.
   if (user_manager::UserManager::IsInitialized()) {
     user_manager::User* user =
         user_manager::UserManager::Get()->GetActiveUser();
     if (user && user->is_profile_created())
       return profile_ == ProfileManager::GetActiveUserProfile();
   }
 #endif
   return true;
 }