From 577ca2cd6040a7b4406331cdafa89778de871c20 Mon Sep 17 00:00:00 2001
From: wicknix <39230578+wicknix@users.noreply.github.com>
Date: Mon, 15 Apr 2019 19:04:39 -0500
Subject: Bug1408701: Ensure that we continue to show dark scrollbar thumbs
 on..

..macOS 10.13+ when scrollbars are always displayed. r=mstange
---
 widget/cocoa/nsNativeThemeCocoa.mm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'widget')

diff --git a/widget/cocoa/nsNativeThemeCocoa.mm b/widget/cocoa/nsNativeThemeCocoa.mm
index 3c8695442..597c25a48 100644
--- a/widget/cocoa/nsNativeThemeCocoa.mm
+++ b/widget/cocoa/nsNativeThemeCocoa.mm
@@ -2778,7 +2778,8 @@ nsNativeThemeCocoa::DrawWidgetBackground(nsRenderingContext* aContext,
       NSMutableDictionary* options = [NSMutableDictionary dictionaryWithObjectsAndKeys:
         (isOverlay ? @"kCUIWidgetOverlayScrollBar" : @"scrollbar"), @"widget",
         (isSmall ? @"small" : @"regular"), @"size",
-        (isHorizontal ? @"kCUIOrientHorizontal" : @"kCUIOrientVertical"), @"kCUIOrientationKey",
+        (isOverlay && isOnTopOfDarkBackground ? @"kCUIVariantWhite" : @""),
+          @"kCUIVariantKey",
         (isOnTopOfDarkBackground ? @"kCUIVariantWhite" : @""), @"kCUIVariantKey",
         [NSNumber numberWithBool:YES], @"indiconly",
         [NSNumber numberWithBool:YES], @"kCUIThumbProportionKey",
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