GitLab

Move the logic of adding the extra four-pixel padding for tablet mode
from ScrollableShelfView::Layout to ScrollableShelfContainerView's
layout. It helps to update the shelf view's layout after switching to
the tablet mode.

Bug: 1012354
Change-Id: I975954faf687c144166e8a86ae9fa89959e931f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1850796Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Andrew Xu <andrewxu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712673}