Add device policy: Kiosk Virtual Keyboard Layout.

chrome/browser/chromeos/app_mode/kiosk_app_manager.h

Index: chrome/browser/chromeos/app_mode/kiosk_app_manager.h
diff --git a/chrome/browser/chromeos/app_mode/kiosk_app_manager.h b/chrome/browser/chromeos/app_mode/kiosk_app_manager.h
index 7a9fe670717e657fafc2c94aacf44af4e7e58c44..d99e39569d49410a8da2e55189f10b656ba31d47 100644
--- a/chrome/browser/chromeos/app_mode/kiosk_app_manager.h
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_manager.h
@@ -153,6 +153,8 @@ class KioskAppManager : public KioskAppDataDelegate,
   void AddObserver(KioskAppManagerObserver* observer);
   void RemoveObserver(KioskAppManagerObserver* observer);
 
+  void UpdateKeyboardLayout();
+
  private:
   friend struct base::DefaultLazyInstanceTraits<KioskAppManager>;
   friend struct base::DefaultDeleter<KioskAppManager>;
@@ -228,6 +230,8 @@ class KioskAppManager : public KioskAppDataDelegate,
       local_accounts_subscription_;
   scoped_ptr<CrosSettings::ObserverSubscription>
       local_account_auto_login_id_subscription_;
+  // Virtual keyboard layout subscription.
+  scoped_ptr<CrosSettings::ObserverSubscription> keyboard_layout_subscription_;
 
   scoped_ptr<ExternalCache> external_cache_;