Updating custom scrollbar style

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 63c7faa24d53d41603d8cea36476da2ffbb9c253..3ee3d085a79eccae4d511082f9b0447120e79d7a 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -323,6 +323,17 @@ void FrameView::detachCustomScrollbars()
     }
 }
 
+void FrameView::recalculateCustomScrollbarStyle()
+{
+    if (hasCustomScrollbars()) {
+        if (m_horizontalScrollbar && m_horizontalScrollbar->isCustomScrollbar())
+            m_horizontalScrollbar->styleChanged();
+        if (m_verticalScrollbar && m_verticalScrollbar->isCustomScrollbar())
+            m_verticalScrollbar->styleChanged();
+        updateScrollbarGeometry();
+    }
+}
+
 void FrameView::recalculateScrollbarOverlayStyle()
 {
     ScrollbarOverlayStyle oldOverlayStyle = scrollbarOverlayStyle();