<rdar://problem/59340940>
Created attachment 390616 [details] WIP
Created attachment 390643 [details] Patch
Created attachment 390645 [details] Fix open source build
Comment on attachment 390645 [details] Fix open source build Clearing flags on attachment: 390645 Committed r256520: <https://trac.webkit.org/changeset/256520>
All reviewed patches have been landed. Closing bug.