The circumstances under which this might happen are left up to the
invoking recipe, which in most cases is the chromium presubmit.py.

Bug: 1034114
Change-Id: Ia8db6ab0da04750d6753e6281ef859e19aea4039
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2018224
Commit-Queue: Aaron Gable <agable@chromium.org>
Reviewed-by: Anthony Polito <apolito@google.com>