GitLab

It tells us that failures are due to I/O errors, access denied errors,
and other things we can't do anything about (likely odd drivers, too).

R=chromium-metrics-reviews@google.com, gab@chromium.org

Bug: 1156213
Change-Id: If4fb97d44d8b9a59db48239c68e69a56f59cd462
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2609143
Commit-Queue: Greg Thompson <grt@chromium.org>
Auto-Submit: Greg Thompson <grt@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Reviewed-by: Brian White <bcwhite@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841442}