GitLab

This CL cleans up GridCell and updates the colors.

Bug: 818198
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Id080667cf704af3d33745ab9019f1556693f80e5
Reviewed-on: https://chromium-review.googlesource.com/963724Reviewed-by: Sergio Collazos <sczs@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Commit-Queue: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543477}