GitLab

- Eliminates client lib's ConnectParams struct as this is no longer needed.
- Converts call sites.
- In Service Manager, RegisterService just calls Connect() with some empty values. The codepath is mostly the same. Note that when the ClientProcessConnection is passed now OnGotResolvedName returns early prior to completing the connection, as RegisterService is not a "connect" action, just a "start" one.

R=rockot@chromium.org,tsepez@chromium.org

Review-Url: https://codereview.chromium.org/2610173003
Cr-Commit-Position: refs/heads/master@{#442114}