$OpenBSD: patch-content_renderer_webscrollbarbehavior_impl_gtkoraura_cc,v 1.1 2015/02/15 19:51:28 robert Exp $
--- content/renderer/webscrollbarbehavior_impl_gtkoraura.cc.orig.port	Sun Feb 15 11:01:57 2015
+++ content/renderer/webscrollbarbehavior_impl_gtkoraura.cc	Sun Feb 15 11:05:12 2015
@@ -13,7 +13,7 @@ bool WebScrollbarBehaviorImpl::shouldCenterOnThumb(
       blink::WebScrollbarBehavior::Button mouseButton,
       bool shiftKeyPressed,
       bool altKeyPressed) {
-#if (defined(OS_LINUX) && !defined(OS_CHROMEOS))
+#if (defined(OS_BSD) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)
   if (mouseButton == blink::WebScrollbarBehavior::ButtonMiddle)
     return true;
 #endif
