Allow menus to stay open during a child view's drag and drop

ui/views/controls/menu/menu_host.cc

Index: ui/views/controls/menu/menu_host.cc
diff --git a/ui/views/controls/menu/menu_host.cc b/ui/views/controls/menu/menu_host.cc
index 2716ec8bb782c1a46288c0ab449d80a2a96e2caf..f7a004849c5217376dc46112a9728b61aa11c979 100644
--- a/ui/views/controls/menu/menu_host.cc
+++ b/ui/views/controls/menu/menu_host.cc
@@ -110,8 +110,11 @@ void MenuHost::OnMouseCaptureLost() {
     return;
   MenuController* menu_controller =
       submenu_->GetMenuItem()->GetMenuController();
-  if (menu_controller && !menu_controller->drag_in_progress())
+  if (menu_controller &&
+      !menu_controller->drag_in_progress() &&
+      !child_drag_in_progress()) {
     menu_controller->CancelAll();
+  }
   Widget::OnMouseCaptureLost();
 }