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- sets grid background color
- sets colors for empty state
- switches done and close all buttons for bottom toolbar

Bug: 818198
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Iaae31633889c8f013c5ea1da59176f75186df434
Reviewed-on: https://chromium-review.googlesource.com/967278Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Commit-Queue: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543850}