https://bugs.webkit.org/show_bug.cgi?id=165178 caused a regression since it doesn't allow commas in Accept, Accept-Language, and Content-Language request headers for simple CORS.
rdar://problem/29560983
Also rdar://problem/29562808.
Created attachment 296439 [details] Patch
Comment on attachment 296439 [details] Patch Clearing flags on attachment: 296439 Committed r209510: <http://trac.webkit.org/changeset/209510>
All reviewed patches have been landed. Closing bug.