This causes review links to be shown using crrev.com/c/ or crrev.com/i/,
which are the ones recommended at https://polygerrit.appspot.com/.
This gerrit server is no longer used only by CrOS.

Change-Id: Ie6b856390ec465f9d35a5035547f7b779392b24c
Reviewed-on: https://chromium-review.googlesource.com/526612Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Jeremy Roman <jbroman@chromium.org>