This is an automated CL created by the recipe roller. This CL rolls recipe
changes from upstream projects (e.g. depot_tools) into downstream projects
(e.g. tools/build).


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

recipe_engine:
  https://crrev.com/5a74d04e181b07592fb57abd5602bafe276e2b17 bootstrap: Invoke "pip" through Python. (dnj@chromium.org)

TBR=iannucci@chromium.org

Change-Id: Iadb36eb631b2fbbefa9ea61b72c55a69564f9b81
Recipe-Tryjob-Bypass-Reason: Autoroller
Bugdroid-Send-Email: False
Reviewed-on: https://chromium-review.googlesource.com/473894
Reviewed-by: <recipe-roller@chromium.org>
Commit-Queue: <recipe-roller@chromium.org>