height/width -> borderBox top/left/bottom/right -> borderBox's position in containing block's coordinate system
Created attachment 342890 [details] Patch
Created attachment 342891 [details] Patch
Comment on attachment 342891 [details] Patch Clearing flags on attachment: 342891 Committed r232914: <https://trac.webkit.org/changeset/232914>
All reviewed patches have been landed. Closing bug.
<rdar://problem/41196351>