[Aura] Ignore selection changes when a menu is closing.

ui/views/controls/menu/menu_controller.cc

Index: ui/views/controls/menu/menu_controller.cc
diff --git a/ui/views/controls/menu/menu_controller.cc b/ui/views/controls/menu/menu_controller.cc
index 584da3cd4847341a0d61556dfd6743537e3a8793..017879f02dae3b05b476ab19f5863ec57c2a8c37 100644
--- a/ui/views/controls/menu/menu_controller.cc
+++ b/ui/views/controls/menu/menu_controller.cc
@@ -2263,6 +2263,10 @@ void MenuController::HandleMouseLocation(SubmenuView* source,
   if (showing_submenu_)
     return;
 
+  // Ignore mouse events if we're closing the menu.
+  if (exit_type_ != EXIT_NONE)
+    return;
+
   MenuPart part = GetMenuPart(source, mouse_location);
 
   UpdateScrolling(part);