[Apple Pay] Tell websites why a session was cancelled
Created attachment 379029 [details] Patch
<rdar://problem/55469706>
Comment on attachment 379029 [details] Patch Clearing flags on attachment: 379029 Committed r250048: <https://trac.webkit.org/changeset/250048>
All reviewed patches have been landed. Closing bug.
Build fix: <https://trac.webkit.org/changeset/250057>