Stop exposing showModalDialog(), behind a linked-on-after check.
Pull request: https://github.com/WebKit/WebKit/pull/2658
<rdar://problem/97441232>
Committed 252759@main (c4bb4d1af89e): <https://commits.webkit.org/252759@main> Reviewed commits have been landed. Closing PR #2658 and removing active labels.
*** Bug 151885 has been marked as a duplicate of this bug. ***