Added line loop tests. Change-Id: I77a8997ccdf1b0918127d6d46a145039a941ce06 Reviewed-on: https://chromium-review.googlesource.com/179355 Reviewed-by: Nicolas Capens <nicolascapens@chromium.org> Commit-Queue: Nicolas Capens <nicolascapens@chromium.org> Tested-by: Nicolas Capens <nicolascapens@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>