This is part of bug 225731 activity.
Created attachment 428493 [details] Patch
Created attachment 428771 [details] Patch
Created attachment 428773 [details] Patch
Committed r277567 (237795@main): <https://commits.webkit.org/237795@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 428773 [details].
<rdar://problem/78077656>