Since r248547 a few issues have crept in which have broken non-unified builds.
Created attachment 377026 [details] Patch
Comment on attachment 377026 [details] Patch Clearing flags on attachment: 377026 Committed r249022: <https://trac.webkit.org/changeset/249022>
All reviewed patches have been landed. Closing bug.
<rdar://problem/54608265>