Auto-generate OWNERS file based on number of commits. BUG=None TEST=None Change-Id: I9573163b0920a72ba16f9081d97a092b17de9988 Reviewed-on: https://chromium-review.googlesource.com/191798 Reviewed-by: Jon Salz <[email protected]> Tested-by: Jon Salz <[email protected]> Commit-Queue: Jon Salz <[email protected]>