GitLab

Restore before moving across displays, re-maximize on exit.
Add a simple interactive ui test.

Bug: 1149666
Change-Id: I57caa7f8f5c7351e4489ef7aad6387111bf4c7fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2542763Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828580}