1695679 - Various reftest failures due to different scrollbar sizing with non-native theme enabled on Windows.

Status: RESOLVED FIXED

(Core :: Widget: Win32, defect)

Comment 1

[Emilio Cobos Álvarez (:emilio)]

Attachment: Bug 1695679 - Simplify non-native theme scrollbar sizing on Windows to match the native theme. r=mstange

The native theme doesn't enforce the size of the whole scrollbar. This is
important because if the scrollbar overflows the scroller we might suppress it.

This causes a variety of test failures with the non-native theme enabled. One
of the most glaring ones is:

http://wpt.live/css/css-flexbox/overflow-auto-006.html

We don't show scrollbars for the inline elements because their width is 50px
and the min scrollbar ends up being 51px (17 * 3) which is pretty unfortunate.

Instead, allow the thumb / scrollbar / track to shrink like the native theme.

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/09b73f8c2145
Simplify non-native theme scrollbar sizing on Windows to match the native theme. r=mstange

Comment 3

[Bogdan Tara[:bogdan_tara | bogdant]]

https://hg.mozilla.org/mozilla-central/rev/09b73f8c2145