Layout should trigger both horizontal and vertical alignment while preferred width computation should only do (logical)horizontal.
<rdar://problem/51511043>
Created attachment 371557 [details] Patch
Comment on attachment 371557 [details] Patch Clearing flags on attachment: 371557 Committed r246206: <https://trac.webkit.org/changeset/246206>
All reviewed patches have been landed. Closing bug.