See https://github.com/whatwg/html/pull/9312.
Pull request: https://github.com/WebKit/WebKit/pull/16391
<rdar://problem/113649946>
Committed 267779@main (b8c6566d5568): <https://commits.webkit.org/267779@main> Reviewed commits have been landed. Closing PR #16391 and removing active labels.