The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/632ada879bd7a155f64f9ee9b28634aac5810e92

commit 632ada879bd7a155f64f9ee9b28634aac5810e92
Author: estade <estade@chromium.org>
Date: Wed Dec 14 18:34:30 2016

Improving the appearance of overlay scrollbars
with scroll views that have headers (like the task manager).
Also a bit of refactor to improve readability.

This has no real effect until we turn on overlay bars in more places.

BUG= 672199 
TBR=rdevlin.cronin@chromium.org

Review-Url: https://codereview.chromium.org/2555213004
Cr-Commit-Position: refs/heads/master@{#438542}

[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ash/common/system/tray/fixed_sized_scroll_view.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ash/common/system/tray/tray_details_view.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/chrome/browser/ui/views/toolbar/extension_toolbar_menu_view.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/message_center/views/message_center_view.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/message_center/views/notifier_settings_view.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scroll_view.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scroll_view.h
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scroll_view_unittest.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/base_scroll_bar.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/base_scroll_bar.h
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/cocoa_scroll_bar.h
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/cocoa_scroll_bar.mm
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/overlay_scroll_bar.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/overlay_scroll_bar.h
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/scroll_bar.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/scroll_bar.h
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/scroll_bar_views.cc
[modify] https://crrev.com/632ada879bd7a155f64f9ee9b28634aac5810e92/ui/views/controls/scrollbar/scroll_bar_views.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4f79e19d5d6d12d36b75cad34eb45b620c23caa2

commit 4f79e19d5d6d12d36b75cad34eb45b620c23caa2
Author: estade <estade@chromium.org>
Date: Thu Dec 15 04:12:02 2016

Use overlay scrollbars by default in CrOS native UI.

BUG= 672199 

Review-Url: https://codereview.chromium.org/2558173006
Cr-Commit-Position: refs/heads/master@{#438730}

[modify] https://crrev.com/4f79e19d5d6d12d36b75cad34eb45b620c23caa2/ash/common/system/tray/fixed_sized_scroll_view.cc
[modify] https://crrev.com/4f79e19d5d6d12d36b75cad34eb45b620c23caa2/ui/views/style/platform_style.cc

Chrome 57.0.2987.30/9202.17.0. 
Scrollbar overlaps on the column see attached screenshot

Deleted: Screenshot 2017-02-06 at 11.11.20 AM.png 788 KB

	Screenshot 2017-02-06 at 11.11.20 AM.png 788 KB View Download