Change MenuControllerDelegate to provide WeakPtr

ui/views/controls/menu/menu_controller_delegate.h

Index: ui/views/controls/menu/menu_controller_delegate.h
diff --git a/ui/views/controls/menu/menu_controller_delegate.h b/ui/views/controls/menu/menu_controller_delegate.h
index 85e92069082e03790361900641c60cd4a44175b6..8ac1c862b6e87e767c6ee33849b13bc82d2e5f36 100644
--- a/ui/views/controls/menu/menu_controller_delegate.h
+++ b/ui/views/controls/menu/menu_controller_delegate.h
@@ -5,6 +5,8 @@
 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_DELEGATE_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_CONTROLLER_DELEGATE_H_
 
+#include "base/memory/weak_ptr.h"
+
 namespace views {
 
 class MenuItemView;
@@ -15,7 +17,8 @@ namespace internal {
 
 // Used by MenuController to notify of interesting events that are intended for
 // the class using MenuController. This is implemented by MenuRunnerImpl.
-class MenuControllerDelegate {
+class MenuControllerDelegate
+    : public base::SupportsWeakPtr<MenuControllerDelegate> {
  public:
   enum NotifyType {
     NOTIFY_DELEGATE,