Copy form data when being redirected with 308 with NetworkSession
Created attachment 271574 [details] Patch
http://trac.webkit.org/changeset/196707
The test just verifies existing behavior. This change had no change in behavior (or even compiled binary when USE_NETWORK_SESSION is 0, which it is by default now). I verified that Chrome, Firefox, and Safari all have the same behavior in the new test.