GitLab

No-op jobs no longer exist for dummy builders that are named as mirrors
for trybots. Those builders can now appear as mirrors in a trybot config
but can't specify a parent builder, so they won't be triggered. No-op
jobs continue to exist for tester builders where for whatever reason we
do not want to run them on the branches.

Change-Id: I0a0f5ac5213ff7aef9e1c7e73730428756f3f2b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2462236
Auto-Submit: Garrett Beaty <gbeaty@chromium.org>
Reviewed-by: Stephen Martinis <martiniss@chromium.org>
Commit-Queue: Stephen Martinis <martiniss@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815310}