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Bottom-botder was disabled (because it conflicted with another line).
This Cl returns it back.

Bug: 852049
Change-Id: I2bd0d2282114809f19e85bced6f821b1b8379aa7
Reviewed-on: https://chromium-review.googlesource.com/1171954Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583160}