[Web Animations] Add Web Platform tests
Created attachment 325346 [details] Patch
Created attachment 325351 [details] Patch for landing
Comment on attachment 325351 [details] Patch for landing Clearing flags on attachment: 325351 Committed r224182: <https://trac.webkit.org/changeset/224182>
All reviewed patches have been landed. Closing bug.
<rdar://problem/35254418>