cleanup: Remove unused #includes.

chrome/browser/chromeos/login/language_switch_menu.cc

 // Copyright (c) 2012 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/language_switch_menu.h"
 
 #include "ash/shell.h"
 #include "base/i18n/rtl.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
-#include "chrome/browser/chromeos/language_preferences.h"
 #include "chrome/browser/chromeos/login/language_list.h"
 #include "chrome/browser/chromeos/login/ownership_service.h"
 #include "chrome/browser/chromeos/login/screen_observer.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
 #include "grit/platform_locale_settings.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 170 matching lines @@
 void LanguageSwitchMenu::ExecuteCommand(int command_id) {
   const std::string locale = language_list_->GetLocaleFromIndex(command_id);
   // Here, we should enable keyboard layouts associated with the locale so
   // that users can use those keyboard layouts on the login screen.
   SwitchLanguageAndEnableKeyboardLayouts(locale);
   InitLanguageMenu();
   NotifyLocaleChanged(ash::Shell::GetRootWindow());
 }
 
 }  // namespace chromeos