SOAuthorizationSession should tell AppSSO whether the UIClient is capable of showing the extension UI.
<rdar://problem/52790112>
Created attachment 374103 [details] Patch
Comment on attachment 374103 [details] Patch Thanks Brent for r+ this patch.
Comment on attachment 374103 [details] Patch Clearing flags on attachment: 374103 Committed r247437: <https://trac.webkit.org/changeset/247437>
All reviewed patches have been landed. Closing bug.
A build fix: https://trac.webkit.org/changeset/247458/webkit