BUG=chromium:973247

Change-Id: Ia0c0625446845ff1c590e0ae455b099ecab958ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1746747
Commit-Queue: Yaakov Shaul <yshaul@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>