isModalInPopover has been deprecated for a long time and has been renamed to isModalInPresentation.
Pull request: https://github.com/WebKit/WebKit/pull/10221
Committed 260631@main (9c0551e351a9): <https://commits.webkit.org/260631@main> Reviewed commits have been landed. Closing PR #10221 and removing active labels.
<rdar://problem/105744893>