Enable hiding top bar by setting its height to zero.

Bug: 882404
Change-Id: Iaa93ed3b96a70ba78fff6bc711eb0404b52f179f
Reviewed-on: https://chromium-review.googlesource.com/c/1412397
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Michael van Ouwerkerk <mvanouwerkerk@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Commit-Queue: John Lin <chuanl@google.com>
Cr-Commit-Position: refs/heads/master@{#625355}
4 files changed