GitLab

Instead of verifying that a user manually ran the update command, just
run it anyways and block presubmit if there are uncommitted changes
(namely the updated csv and json files).

BUG=chromium:781312

Change-Id: I8f05cd0bf817ca958c608c0e54c87a990ba6848e
Reviewed-on: https://chromium-review.googlesource.com/754062
Commit-Queue: Ashley Enstad <ashleymarie@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#516066}