WKFrameIsDisplayingMarkupDocument() should return true after a window.open/document.write.
<rdar://problem/56717726>
Created attachment 382229 [details] Patch
Comment on attachment 382229 [details] Patch Clearing flags on attachment: 382229 Committed r251787: <https://trac.webkit.org/changeset/251787>
All reviewed patches have been landed. Closing bug.