Revert of Stop MenuItemView From Directly Caching MenuController

ui/views/controls/menu/submenu_view.cc

Index: ui/views/controls/menu/submenu_view.cc
diff --git a/ui/views/controls/menu/submenu_view.cc b/ui/views/controls/menu/submenu_view.cc
index 1f9abd424f51b660ece4e06de6f6fcb3cfc681f0..88431caaffb36afc167830d9bf9a4cf56f53950d 100644
--- a/ui/views/controls/menu/submenu_view.cc
+++ b/ui/views/controls/menu/submenu_view.cc
@@ -454,9 +454,7 @@
 
 void SubmenuView::MenuHostDestroyed() {
   host_ = NULL;
-  MenuController* controller = GetMenuItem()->GetMenuController();
-  if (controller)
-    controller->Cancel(MenuController::EXIT_DESTROYED);
+  GetMenuItem()->GetMenuController()->Cancel(MenuController::EXIT_DESTROYED);
 }
 
 const char* SubmenuView::GetClassName() const {