https://drafts.csswg.org/css-view-transitions-1/#ua-styles
<rdar://problem/118667044>
Pull request: https://github.com/WebKit/WebKit/pull/20768
Committed 271000@main (7e36e3eaa9f9): <https://commits.webkit.org/271000@main> Reviewed commits have been landed. Closing PR #20768 and removing active labels.