Since 177484 has landed, the order of requestAnimationFrame and resizeobserver callback is right. No need to mark eventLoop.html as flaky.
Created attachment 367620 [details] Patch
Comment on attachment 367620 [details] Patch Clearing flags on attachment: 367620 Committed r244376: <https://trac.webkit.org/changeset/244376>
All reviewed patches have been landed. Closing bug.
<rdar://problem/49971296>
*** Bug 196422 has been marked as a duplicate of this bug. ***