It is no longer used by any platform.
Created attachment 374612 [details] Patch
<rdar://problem/53407573>
Created attachment 374686 [details] Patch
Comment on attachment 374686 [details] Patch r=me once the bots are happy with it
Created attachment 374808 [details] Patch for landing
Comment on attachment 374808 [details] Patch for landing Clearing flags on attachment: 374808 Committed r247800: <https://trac.webkit.org/changeset/247800>
All reviewed patches have been landed. Closing bug.
Clearing flags on attachment: 374808