DiscussionLayout:A discussion with short comments

Build 1920 on ab/video-card-redesign
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Baseline History
Build 192074024a0
Current build. There are unaccepted changes, so build 1900 is still the baseline.
Build 19007018dea current baseline
Accepted by Ioanna Kokkini.
Build 1896ae556ac
Auto-accepted
Build 18777799fe9
Auto-accepted
Build 18642729d6d
Auto-accepted
Commenting is disabled because there's a newer build on this branch