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This change fixes the gap between the bottom of the scanned image border
and its focus shadow.

Before: http://screen/6tdVfoSCvnEy72p
After: http://screen/5LVWsQbm3NEdkAy

Bug: 1059779
Change-Id: I31c30b9cc940b8b4394da71fc4b3287dc43a4527
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2618557Reviewed-by: Jesse Schettler <jschettler@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: Gavin Williams <gavinwill@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841823}