This is to deploy the changes of crbug.com/1149662, which enables
BatchCreateArtifacts in ResultSink.

Bug: 1149662
Change-Id: Ib3669ad9c2f02deb62455a9e3ef05ef858ef1290
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2862880Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Scott Lee <ddoman@chromium.org>