For the threaded animation resolution work, we need a class that puts together key timing and keyframes properties from WebAnimation and KeyframeEffect which we be able to be encode and decode over IPC in future patches.
Pull request: https://github.com/WebKit/WebKit/pull/10868
Committed 261014@main (3a375e3ac37d): <https://commits.webkit.org/261014@main> Reviewed commits have been landed. Closing PR #10868 and removing active labels.
<rdar://problem/106093443>