This is an automated CL created by the recipe roller. This CL rolls
recipe changes from upstream projects (recipe_engine) into this repository.

The build that created this CL was
https://ci.chromium.org/b/8830911573120972465

recipe_engine:
https://chromium.googlesource.com/infra/luci/recipes-py.git/+/c71d9e10f6d5c36602a50ebd7b8e79053c21bfdc
  c71d9e1 (olivernewman@google.com)
      [buildbucket] Allow setting empty gerrit_changes

More info is at https://goo.gl/zkKdpD. Use https://goo.gl/noib3a to file a bug.

R=iannucci@chromium.org

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: I6dccb353f86ad0bbaf4e857984e57c11357949ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3273330
Commit-Queue: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>