Hopefully no behavior change :)

Bug: none
Change-Id: I62710ce8c07c4df4cb0fd8cb916127616f47ee8b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2867312
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Dirk Pranke <dpranke@google.com>