This reverts commit ea4301e5. We now have many
reponse headers, stopping contributions until and unless we are asked for more
as part of debugging git cl upload issues.

R=tandrii@chromium.org

Bug: 881860
Change-Id: Ic3524aa93f146cebd882efe30b2e3f110cf74838
Reviewed-on: https://chromium-review.googlesource.com/1241613Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Andy Perelson <ajp@chromium.org>