We need a quirk for cookie blocking latch mode when a third-party subresource from ymail.com redirects to yahoo.com under yahoo.com.
Created attachment 393781 [details]
Layout test failures are unrelated.
Comment on attachment 393781 [details]
Clearing flags on attachment: 393781
Committed r258599: <https://trac.webkit.org/changeset/258599>
All reviewed patches have been landed. Closing bug.