GitLab

1. Migrate tests to robolectric unit tests.
2. Add one integration test to confirm it's initialized

Change-Id: I8e89487a7ece9cbef330caec6dae0e7bae25d44f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2639647
Commit-Queue: Yaron Friedman <yfriedman@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845220}