GitLab

The tapping area for the arrow button in the scrollable shelf is really
small, which makes it hard to click on small devices. This change
increases it enopugh for it to be easier to hit the target.

Bug: 1004998
Change-Id: I74c9c3083e496f1e248eb00383be3ae1ba35bcf0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1815359
Commit-Queue: Ana Salazar <anasalazar@chromium.org>
Reviewed-by: Manu Cornet <manucornet@chromium.org>
Reviewed-by: Andrew Xu <andrewxu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#698976}