It's already used at parse-time, we should use it in the computed style for consistency.
<rdar://problem/111533680>
Pull request: https://github.com/WebKit/WebKit/pull/15422
Committed 265634@main (dc361dd85a35): <https://commits.webkit.org/265634@main> Reviewed commits have been landed. Closing PR #15422 and removing active labels.