Replace ToLower calls to the new format

chrome/browser/chromeos/login/session/user_session_manager.cc

 // Copyright 2014 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/login/session/user_session_manager.h"
 
 #include <string>
 
 #include "base/base_paths.h"
 #include "base/bind.h"
@@ skipping 1127 matching lines @@
 
   bool can_show_getstarted_guide = user_manager->GetActiveUser()->GetType() ==
                                    user_manager::USER_TYPE_REGULAR;
 
   // Skip the default first-run behavior for public accounts.
   if (!user_manager->IsLoggedInAsPublicAccount()) {
     if (AccessibilityManager::Get()->IsSpokenFeedbackEnabled()) {
       const char* url = kChromeVoxTutorialURLPattern;
       PrefService* prefs = g_browser_process->local_state();
       const std::string current_locale =
-          base::StringToLowerASCII(prefs->GetString(prefs::kApplicationLocale));
+          base::ToLowerASCII(prefs->GetString(prefs::kApplicationLocale));
       std::string vox_url = base::StringPrintf(url, current_locale.c_str());
       start_urls.push_back(vox_url);
       can_show_getstarted_guide = false;
     }
   }
 
   // Only show getting started guide for a new user.
   const bool should_show_getstarted_guide = user_manager->IsCurrentUserNew();
 
   if (can_show_getstarted_guide && should_show_getstarted_guide) {
@@ skipping 568 matching lines @@
   token_handle_util_.reset();
 }
 
 void UserSessionManager::CreateTokenUtilIfMissing() {
   if (!token_handle_util_.get())
     token_handle_util_.reset(
         new TokenHandleUtil(user_manager::UserManager::Get()));
 }
 
 }  // namespace chromeos