The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e7af0866205dc516bb5a6b2cd3e020f9e8112aa8

commit e7af0866205dc516bb5a6b2cd3e020f9e8112aa8
Author: estade <estade@chromium.org>
Date: Thu Jan 19 14:53:00 2017

Views overlay scrollbars - show on mouse hover.

This is a revert of https://crrev.com/b9232bb95ce16908bb79

BUG= 682527 

Review-Url: https://codereview.chromium.org/2641023003
Cr-Commit-Position: refs/heads/master@{#444732}

[modify] https://crrev.com/e7af0866205dc516bb5a6b2cd3e020f9e8112aa8/ui/views/controls/scrollbar/overlay_scroll_bar.cc
[modify] https://crrev.com/e7af0866205dc516bb5a6b2cd3e020f9e8112aa8/ui/views/controls/scrollbar/overlay_scroll_bar.h

looks like it made it into 57

[Auto-generated comment by a script] We noticed that this issue is targeted for M-57; it appears the fix may have landed after branch point, meaning a merge might be required. Please confirm if a merge is required here - if so add Merge-Request-57 label, otherwise remove Merge-TBD label. Thanks.

444732 < 444943