We introduced the AnimatableProperty type in bug 249498, which removes the need for CSSPropertyAnimation::Property.
Pull request: https://github.com/WebKit/WebKit/pull/7812
Committed 258050@main (6cb1d999a152): <https://commits.webkit.org/258050@main> Reviewed commits have been landed. Closing PR #7812 and removing active labels.
<rdar://problem/103482774>