They might make CORS checks to fail.
Created attachment 328542 [details] Patch
Comment on attachment 328542 [details] Patch r=me
Comment on attachment 328542 [details] Patch Clearing flags on attachment: 328542 Committed r225574: <https://trac.webkit.org/changeset/225574>
All reviewed patches have been landed. Closing bug.
<rdar://problem/35895960>