So that tests can turn the feature off in WK1 if needed.
Created attachment 387634 [details] patch
Created attachment 387637 [details] patch
Comment on attachment 387637 [details] patch Clearing flags on attachment: 387637 Committed r254510: <https://trac.webkit.org/changeset/254510>
All reviewed patches have been landed. Closing bug.
<rdar://problem/58567923>