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

recipe_engine:
  https://crrev.com/b509c8e28ba5142f5f798f44f5abafd2807d04b8 (yiwzhang@google.com)
    [warning] Define Cause proto message and its proto-free equivalent

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

TBR=iannucci@chromium.org

Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Change-Id: Id9644061d4a2b57e529356568a4e915b40fe87a1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2111701Reviewed-by: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Recipe Roller <recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com>