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