bug#58271: 29.0.50; [PATCH] Handle sharing Cocoa xwidgets more gracefully

[Lars Ingebrigtsen]

조성빈 <goranmoomin@daum.net> writes:

> The attached patch fixes this issue by showing a warning label in the place of
> the xwidget view.

Makes sense to me -- perhaps Po Lu has some comments; added to the CCs.

In any case, it looks like this patch is too large to apply without
getting a copyright assignment for the FSF first.  Would you be willing
to sign such paperwork?