GitLab

Adds an optional flag for devices with tablet form factor.

BUG=1019549

Change-Id: I24a95d473fa59d9efe582986b6e19330afa75b07
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1888857Reviewed-by: Yury Khmel <khmel@chromium.org>
Reviewed-by: Jeevan Shikaram <jshikaram@chromium.org>
Commit-Queue: Melissa Zhang <melzhang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712046}