[Notification] Stop calling detachPresenter().

content/renderer/active_notification_tracker.h

Index: content/renderer/active_notification_tracker.h
diff --git a/content/renderer/active_notification_tracker.h b/content/renderer/active_notification_tracker.h
index 6591eae334ff38bcabd37550107f3b329408755b..c8cada908233a4e9aa57d279eebdcc526a6fd807 100644
--- a/content/renderer/active_notification_tracker.h
+++ b/content/renderer/active_notification_tracker.h
@@ -42,10 +42,6 @@ class CONTENT_EXPORT ActiveNotificationTracker {
   // Clears out all active notifications.  Useful on page navigation.
   void Clear();
 
-  // Detaches all active notifications from their presenter.  Necessary
-  // when the Presenter is destroyed.
-  void DetachAll();
-
  private:
   typedef std::map<WebKit::WebNotification, int> ReverseTable;