GitLab

This reverts commit b5cae0bd.

Reason for revert: Settings button and close button on MessageCenterView are missing.

Original change's description:
> Implement scroll shadow on MessageCenterView.
> 
> When MessageCenterView can be scrolled, the 2dp scroll shadow is
> displayed at the bottom.
> 
> The shadow is displayed over notifications on MessageCenterView.
> 
> If MessageCenterView is all scrolled, the shadow is hidden.
> 
> BUG=779880
> 
> Change-Id: I48fdb3e97c57075114ba4210cea40039c295a6d7
> Reviewed-on: https://chromium-review.googlesource.com/923244
> Commit-Queue: Megumi Hattori <megumihattori@google.com>
> Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
> Reviewed-by: Tetsui Ohkubo <tetsui@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#537711}

TBR=yoshiki@chromium.org,tetsui@chromium.org,maajid@chromium.org,megumihattori@google.com

Change-Id: Ib697e58df63ccda943eb4caf920620787bf31577
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 779880
Reviewed-on: https://chromium-review.googlesource.com/925926Reviewed-by: Tetsui Ohkubo <tetsui@chromium.org>
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537718}