GitLab

Enable OS sync in SyncTest, because the feature will be on by
default, and because several ModelTypes become OS-specific
(e.g. APPS, APP_LIST).

Adjust a few test expectations as well.

Bug: 1060289

Change-Id: Iee32868b4a2d1ac13b9e63787c2d5e140aa98139
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2103651
Commit-Queue: James Cook <jamescook@chromium.org>
Auto-Submit: James Cook <jamescook@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751424}