Keyframes can set a <color> custom property to "currentcolor". We should recompute keyframes if the value to which "currentcolor" would resolve changes during an animation. This is similar to work that we did in bug 251491.
Pull request: https://github.com/WebKit/WebKit/pull/9523
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/38329
Committed 259808@main (b1a5811b3017): <https://commits.webkit.org/259808@main> Reviewed commits have been landed. Closing PR #9523 and removing active labels.
<rdar://problem/104997994>