GitLab

capture_mode: Add tests for region capture mode.

Adds tests for crrev.com/c/2404945.

Test: added
Bug: 1120132
Change-Id: Ifb42fa1f8979ef7762614d6edd90dbfefa4d2f1f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422459
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810705}