GitLab

Adds the logic that handshakes with the service control manager
and runs the process as a service.

Bug: 1101590
Change-Id: Id0825d3ea5bbfccb17147740eda26bff04367037
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2329045Reviewed-by: Rakesh Soma <rakeshsoma@google.com>
Commit-Queue: Yusuf Sengul <yusufsn@google.com>
Cr-Commit-Position: refs/heads/master@{#797476}