Add language_prefs namespace to language_preferences.h.

chrome/browser/chromeos/login/language_switch_menu.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/login/language_switch_menu.h"
 
 #include "app/resource_bundle.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
@@ skipping 81 matching lines @@
   // TODO(markusheintz): Change the if condition to prefs->IsUserModifiable()
   // once Mattias landed his pending patch.
   if (!prefs->IsManagedPreference(prefs::kApplicationLocale)) {
     prefs->SetString(prefs::kApplicationLocale, locale);
     prefs->SavePersistentPrefs();
 
     // Switch the locale.
     ResourceBundle::ReloadSharedInstance(locale);
 
     // Enable the keyboard layouts that are necessary for the new locale.
-    chromeos::input_method::EnableInputMethods(
-        locale, chromeos::input_method::kKeyboardLayoutsOnly,
-        kHardwareKeyboardLayout);
+    input_method::EnableInputMethods(
+        locale, input_method::kKeyboardLayoutsOnly,
+        language_prefs::kHardwareKeyboardLayout);
 
     // The following line does not seem to affect locale anyhow. Maybe in
     // future..
     g_browser_process->SetApplicationLocale(locale);
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // views::ViewMenuDelegate implementation.
 
@@ skipping 23 matching lines @@
 void LanguageSwitchMenu::ExecuteCommand(int command_id) {
   const std::string locale = language_list_->GetLocaleFromIndex(command_id);
   SwitchLanguage(locale);
   InitLanguageMenu();
 
   // Update all view hierarchies that the locale has changed.
   views::Widget::NotifyLocaleChanged();
 }
 
 }  // namespace chromeos