[frame-rate] animation with different but compatible frame rates should be aligned
Created attachment 452360 [details] Patch
<rdar://problem/89083932>
Created attachment 452499 [details] Patch for landing
Committed r290121 (247465@main): <https://commits.webkit.org/247465@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 452499 [details].