Now that the migration has happened for these builders, switch
to the new new configs.

Bug=chromium:815092

Change-Id: I68b0817f20fe54583dc465f3cdcdf233439f0a01
Reviewed-on: https://chromium-review.googlesource.com/1012504Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>