This is part of bug 225731 activity.
Created attachment 428507 [details] Patch
Created attachment 428736 [details] Patch
Created attachment 428737 [details] Patch
Committed r277545 (237773@main): <https://commits.webkit.org/237773@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 428737 [details].
<rdar://problem/78062410>