Auto-generate OWNERS file based on number of commits. BUG=None TEST=None Change-Id: I4a105ef11167576870aede142e2b3e761ad9feae Reviewed-on: https://chromium-review.googlesource.com/191814 Reviewed-by: Jon Salz <[email protected]> Commit-Queue: Jon Salz <[email protected]> Tested-by: Jon Salz <[email protected]>