GitLab

Use default argument true for creating a horizontal ScrollBarViews by
default.

Bug: 1108460
Change-Id: Ic19c4e34e6c06372d9004ccbb9d17cc72d31c9cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427525Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Wei Li <weili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810298}