GitLab

This cl replaces SyncAndServices preference with ManageSync preference
and adds a row for Google services preference. The UI changes are
controlled under MOBILE_IDENTITY_CONSISTENCY flag.

Screenshot: https://crbug.com/1092857#c1

Bug: 1092857
Change-Id: I97ef592e0fd94e9b442764933cf99258b8d6a16b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2279755
Commit-Queue: Tanmoy Mollik <triploblastic@chromium.org>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790923}