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://chromium.googlesource.com/infra/luci/recipes-py.git/+/6254729dfa2e618742f04f3240e2f2483ebc25b5
  6254729 (chromium-autoroll@skia-public.iam.gserviceaccount.com)
      Roll CAS Client from 4f6853eb883e to 5639b9acf1cf

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: I03e1f64cd59519d5145c74b7bc74cf5f9b7bd7cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3027296
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>