GitLab

This CL replaces the call to |ShutDown| with |ShutDownProcess|.

The D-Bus method ShutDownProcess allows, depending on the argument, to
shut down the daemon or just one of the worker processes. Since
System-proxy will have a worker which tunnels only ARC traffic, we need
a shut down method that can kill the ARC worker when ARC is disabled by
policy.

Bug:1042639,1109144
TEST=unittests pass

Change-Id: I73c5898095f5a6ee9d454c4a83b824667d2825d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2317958
Commit-Queue: Andreea-Elena Costinas <acostinas@google.com>
Reviewed-by: Omar Morsi <omorsi@google.com>
Reviewed-by: Pavol Marko <pmarko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#794981}