Remove PrefServiceSimple, replacing it with PrefService and PrefRegistrySimple.

chrome/browser/notifications/notification_prefs_manager.cc

Index: chrome/browser/notifications/notification_prefs_manager.cc
diff --git a/chrome/browser/notifications/notification_prefs_manager.cc b/chrome/browser/notifications/notification_prefs_manager.cc
index 01928aac1617c7f82e8b05697aae94fc076216c7..786dc4c2508537486fe9d26806affa4e9136b33c 100644
--- a/chrome/browser/notifications/notification_prefs_manager.cc
+++ b/chrome/browser/notifications/notification_prefs_manager.cc
@@ -4,11 +4,12 @@
 
 #include "chrome/browser/notifications/notification_prefs_manager.h"
 
+#include "chrome/browser/prefs/pref_registrar_simple.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/pref_names.h"
 
 // static
-void NotificationPrefsManager::RegisterPrefs(PrefServiceSimple* prefs) {
+void NotificationPrefsManager::RegisterPrefs(PrefRegistrarSimple* prefs) {
   prefs->RegisterIntegerPref(prefs::kDesktopNotificationPosition,
                              BalloonCollection::DEFAULT_POSITION);
 #if defined(OS_CHROMEOS)