GitLab

Adding coordinator and an empty view controller for the Google services
settings. This work is related Unity.

Screenshots:
https://drive.google.com/open?id=175ZmSyXJQsz_EJMezwu0WhnUuGJM-xxZ
https://drive.google.com/open?id=1kHqvfmCxoN6IsDfsj9TR0VxdqzoBff-M

Mock:
https://docs.google.com/presentation/d/1cZfr5FGWGSy0PNaQ8uzik0alLAH-5glh1vsb030vha8/edit?ts=5aba5455#slide=id.g3b9ec33d4d_17_39

Test target added with: crrev.com/i/640917

Bug: 827072
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I7eb7ff3018a5bcef75e6c7ffddf79497a8a2fa38
Reviewed-on: https://chromium-review.googlesource.com/1096599Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568017}