Couple more wrench menu issues. The patch I sent around a couple of

views/controls/menu/menu_controller.cc

Index: views/controls/menu/menu_controller.cc
diff --git a/views/controls/menu/menu_controller.cc b/views/controls/menu/menu_controller.cc
index a59caacc9ca35f20ff51b2d2618fb68650837243..022f1767dc722f22069c054c01c1157f82b52ab9 100644
--- a/views/controls/menu/menu_controller.cc
+++ b/views/controls/menu/menu_controller.cc
@@ -1325,8 +1325,14 @@ void MenuController::OpenMenu(MenuItemView* item) {
 }
 
 void MenuController::OpenMenuImpl(MenuItemView* item, bool show) {
-  if (show)
+  if (show) {
+    int old_count = item->GetSubmenu()->child_count();
     item->GetDelegate()->WillShowMenu(item);
+    if (old_count != item->GetSubmenu()->child_count()) {
+      // If the number of children changed then we may need to add empty items.
+      item->AddEmptyMenus();
+    }
+  }
   bool prefer_leading =
       state_.open_leading.empty() ? true : state_.open_leading.back();
   bool resulting_direction;