GitLab

Turns the bounds renderer more red than green since the background on
the room-scale test page is also green, thereby giving a clearer color
change to validate the bounds.

Also adds controllers to the room-scale page so that height and tracking
can be validated.

Bug: 909933
Change-Id: Iccdc07aa9f70db71f6626f4c245160882d8b48d8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1729568Reviewed-by: Brandon Jones <bajones@chromium.org>
Commit-Queue: Alexander Cooper <alcooper@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682978}