Remove NOTIFICATION_SYSTEM_SETTING_CHANGED, switch CrosSettings to base::CallbackRegistry.

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 332b9c1b2ce78775af0df72ed3bcc7c7b179f75c..4b826e8b3138cf1a3b02d27fe20fa67864354031 100644
--- a/chrome/browser/chromeos/app_mode/kiosk_app_manager.h
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_manager.h
@@ -11,11 +11,12 @@
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/lazy_instance.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_data_delegate.h"
 #include "chrome/browser/chromeos/policy/enterprise_install_attributes.h"
-#include "content/public/browser/notification_observer.h"
+#include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "ui/gfx/image/image_skia.h"
 
 class PrefRegistrySimple;
@@ -30,8 +31,7 @@ class KioskAppData;
 class KioskAppManagerObserver;
 
 // KioskAppManager manages cached app data.
-class KioskAppManager : public content::NotificationObserver,
-                        public KioskAppDataDelegate {
+class KioskAppManager : public KioskAppDataDelegate {
  public:
   enum ConsumerKioskModeStatus {
     // Consumer kiosk mode can be enabled on this machine.
@@ -152,11 +152,6 @@ class KioskAppManager : public content::NotificationObserver,
   // Update app data |apps_| based on CrosSettings.
   void UpdateAppData();
 
-  // content::NotificationObserver overrides:
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
   // KioskAppDataDelegate overrides:
   virtual void GetKioskAppIconCacheDir(base::FilePath* cache_dir) OVERRIDE;
   virtual void OnKioskAppDataChanged(const std::string& app_id) OVERRIDE;
@@ -188,6 +183,11 @@ class KioskAppManager : public content::NotificationObserver,
   std::string auto_launch_app_id_;
   ObserverList<KioskAppManagerObserver, true> observers_;
 
+  scoped_ptr<CrosSettings::ObserverSubscription>
+      local_accounts_subscription_;
+  scoped_ptr<CrosSettings::ObserverSubscription>
+      local_account_auto_login_id_subscription_;
+
   DISALLOW_COPY_AND_ASSIGN(KioskAppManager);
 };