GitLab

Add tests to the ChromeOS only part of the code.
Fix subtitle for the non-managed devices and
managed/non-managed accounts.

Bug: 879146
Change-Id: I7f24f7b527fcaa8d8ce0b165b3b276bf80ee8936
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1569705
Commit-Queue: Roman Aleksandrov <raleksandrov@google.com>
Reviewed-by: Hector Carmona <hcarmona@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652179}