[Notification] Stop calling detachPresenter().

content/renderer/active_notification_tracker.cc

Index: content/renderer/active_notification_tracker.cc
diff --git a/content/renderer/active_notification_tracker.cc b/content/renderer/active_notification_tracker.cc
index 9f0b6e0b872ae91c6391834567c604a0d0c3e3ee..6192033b0f55fb379ebd9b5b1ef6355b638a921d 100644
--- a/content/renderer/active_notification_tracker.cc
+++ b/content/renderer/active_notification_tracker.cc
@@ -66,16 +66,6 @@ void ActiveNotificationTracker::Clear() {
   }
 }
 
-void ActiveNotificationTracker::DetachAll() {
-  ReverseTable::iterator iter;
-  for (iter = reverse_notification_table_.begin();
-       iter != reverse_notification_table_.end();
-       ++iter) {
-    WebNotification notification(iter->first);
-    notification.detachPresenter();
-  }
-}
-
 WebNotificationPermissionCallback* ActiveNotificationTracker::GetCallback(
     int id) {
   return callback_table_.Lookup(id);