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Uses the existing 9-patch image from the Bottom Sheet for the Preview Tab
Overlay Panel and Tap to Search as well.

Increases the Bar height slightly, and makes the height no longer
variable (was needed for the promo-in-the-bar).

BUG=961454

Change-Id: I9edfef49ce2c37c4ad8bfd8a5dc67f5128dae93c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1606582
Commit-Queue: Donn Denman <donnd@chromium.org>
Auto-Submit: Donn Denman <donnd@chromium.org>
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Jinsuk Kim <jinsukkim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690044}