GitLab

The only custom action in HoverButton's manual layout is to
position title label vertically in its parent. We create a small
custom view class for its parent to change its position upon bound
change. Therefore, we can remove the manual layout in HoverButton.

BUG=1005568

Change-Id: Iea0f9a8236a519373e299b31550d4240551cda7a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1866981
Commit-Queue: Wei Li <weili@chromium.org>
Reviewed-by: Allen Bauer <kylixrd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707575}