On active, dismiss the retail mode screensaver immidiately.

chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h

Index: chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h
diff --git a/chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h b/chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h
index 004c5fc10b7898c916c17016fbe8a4fc444e5440..5b4ca4f656a6953d97b1f6054fdb6b61f9b460d2 100644
--- a/chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h
+++ b/chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h
@@ -9,8 +9,6 @@
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/memory/weak_ptr.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
 
 namespace extensions {
 class Extension;
@@ -18,8 +16,7 @@ class Extension;
 
 namespace chromeos {
 
-class KioskModeScreensaver : public ash::UserActivityObserver,
-                             public content::NotificationObserver {
+class KioskModeScreensaver : public ash::UserActivityObserver {
  public:
   KioskModeScreensaver();
   virtual ~KioskModeScreensaver();
@@ -27,11 +24,6 @@ class KioskModeScreensaver : public ash::UserActivityObserver,
  private:
   friend class KioskModeScreensaverTest;
 
-  // NotificationObserver overrides:
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
   // UserActivityObserver::Observer overrides:
   virtual void OnUserActivity() OVERRIDE;
 
@@ -48,7 +40,6 @@ class KioskModeScreensaver : public ash::UserActivityObserver,
   void SetupScreensaver(scoped_refptr<extensions::Extension> extension,
                         const FilePath& extension_base_path);
 
-  content::NotificationRegistrar registrar_;
   base::WeakPtrFactory<KioskModeScreensaver> weak_ptr_factory_;
 
   FilePath extension_base_path_;