The new service accounts should be like  xx--chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com.

The following revision refers to this bug:
  https://chromium.googlesource.com/infra/infra/+/46824f602be9ce8a3593e77f18ca294f2eb5d912

commit 46824f602be9ce8a3593e77f18ca294f2eb5d912
Author: Chan <chanli@chromium.org>
Date: Thu Mar 22 20:28:39 2018

[Findit] Update whitelisted accounts for auto-revert.

Bug:  824484 
Change-Id: Ifb1cbff4377ddf5f6545c9fad00c1539480a9df1
Reviewed-on: https://chromium-review.googlesource.com/974302
Reviewed-by: Roberto Carrillo <robertocn@chromium.org>
Reviewed-by: Eric Boren <borenet@chromium.org>
Commit-Queue: Roberto Carrillo <robertocn@chromium.org>

[modify] https://crrev.com/46824f602be9ce8a3593e77f18ca294f2eb5d912/appengine/findit/common/constants.py
[modify] https://crrev.com/46824f602be9ce8a3593e77f18ca294f2eb5d912/appengine/findit/services/gerrit.py
[modify] https://crrev.com/46824f602be9ce8a3593e77f18ca294f2eb5d912/appengine/findit/services/test/gerrit_test.py