GitLab

Add the LanConnectivity routine to the ServiceConnection.

BUG=chromium:956783
TEST=1) chromeos_unittests --gtest_filter=CrosHealthdServiceConnectionTest.*
2) Applied LanConnectivity changes and successfully ran the
LanConnectivity routine on a DUT (verified using cros-health-tool diag
--action=run_routine --routine=lan_connectivity).

Change-Id: Ia0c9fd15d07c121d04fa08466694575cc3048d0e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2321005
Commit-Queue: Kartik Hegde <khegde@chromium.org>
Reviewed-by: Paul Moy <pmoy@chromium.org>
Reviewed-by: Oleh Lamzin <lamzin@google.com>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809437}