cros: Add LoginDisplayHostViews and --show-views-login

Bug: 784495
Change-Id: If8ec878df243c24545eb6857f5e488b5e87359b4
Reviewed-on: https://chromium-review.googlesource.com/753125
Commit-Queue: Jacob Dufault <[email protected]>
Reviewed-by: James Cook <[email protected]>
Reviewed-by: Achuith Bhandarkar <[email protected]>
Cr-Commit-Position: refs/heads/master@{#516832}
7 files changed