cros: In OOBE, turn off scrolling if the screen fits in the container

Bug: 855546
Change-Id: I065c2bbd1e3db69dca3f8b18d40ce5beb09f9abd
Reviewed-on: https://chromium-review.googlesource.com/1162715
Reviewed-by: Jacob Dufault <jdufault@chromium.org>
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Commit-Queue: Quan Nguyen <qnnguyen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582312}
1 file changed