I think NativeScrollBar must exist for historical reasons. I expect it used to wrap more than one kind of native scroll bar (e.g. a Windows one, a mac one, etc.). That's no longer the case, so it's an awkward relationship that is mostly a pass-through to NativeScrollBarViews.
(Note that it's not used on MacOS at all.)
Comment 1 by est...@chromium.org
, Nov 5 2016Labels: -Pri-3 M-56 Pri-2