Somehow my patch in https://trac.webkit.org/changeset/251867 didn't include the visual viewport change unlike the earlier https://trac.webkit.org/changeset/251269 Make visualViewport's resize use HTML5 event loop as well.
Created attachment 382854 [details] WIP
Created attachment 382860 [details] Patch
I've manually ran visual viewport tests on iOS (and they pass) since iOS EWS is sick.
Comment on attachment 382860 [details] Patch Clearing flags on attachment: 382860 Committed r252122: <https://trac.webkit.org/changeset/252122>
All reviewed patches have been landed. Closing bug.
<rdar://problem/56930583>