The `all` value for `transition-property` is a special keyword specified by that spec, and not the `all` CSS property shorthand.
Pull request: https://github.com/WebKit/WebKit/pull/10197
Committed 260383@main (47ace8083753): <https://commits.webkit.org/260383@main> Reviewed commits have been landed. Closing PR #10197 and removing active labels.
<rdar://problem/105556116>