To align with Chromium and Gecko. Spec change: https://github.com/whatwg/fullscreen/pull/153
<rdar://problem/102355401>
Pull request: https://github.com/WebKit/WebKit/pull/7306
Committed 257554@main (823024a704ca): <https://commits.webkit.org/257554@main> Reviewed commits have been landed. Closing PR #7306 and removing active labels.