GitLab

Scrollable shelf should place shelf icons in the center of
display when there is sufficient space. That is also the
UI behavior of the current shelf view. This CL achieves the UI
consistency for scrollable shelf.

Bug: 973481
Change-Id: Ifc50e6d62f5508dc84578519c4f6c6522fb845e1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1789677
Commit-Queue: Andrew Xu <andrewxu@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695226}