Scale scrollbar in use-zoom-for-dsf mode

third_party/WebKit/Source/core/layout/LayoutScrollbar.cpp

 /*
  * Copyright (C) 2008, 2009 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 24 matching lines @@
 #include "platform/graphics/GraphicsContext.h"
 
 namespace blink {
 
 PassRefPtrWillBeRawPtr<Scrollbar> LayoutScrollbar::createCustomScrollbar(ScrollableArea* scrollableArea, ScrollbarOrientation orientation, Node* ownerNode, LocalFrame* owningFrame)
 {
     return adoptRefWillBeNoop(new LayoutScrollbar(scrollableArea, orientation, ownerNode, owningFrame));
 }
 
 LayoutScrollbar::LayoutScrollbar(ScrollableArea* scrollableArea, ScrollbarOrientation orientation, Node* ownerNode, LocalFrame* owningFrame)
-    : Scrollbar(scrollableArea, orientation, RegularScrollbar, LayoutScrollbarTheme::layoutScrollbarTheme())
+    : Scrollbar(scrollableArea, orientation, RegularScrollbar, nullptr, LayoutScrollbarTheme::layoutScrollbarTheme())
     , m_owner(ownerNode)
     , m_owningFrame(owningFrame)
 {
     ASSERT(ownerNode || owningFrame);
 
     // FIXME: We need to do this because LayoutScrollbar::styleChanged is called as soon as the scrollbar is created.
 
     // Update the scrollbar size.
     IntRect rect(0, 0, 0, 0);
     updateScrollbarPart(ScrollbarBGPart);
@@ skipping 305 matching lines @@
     return orientation() == HorizontalScrollbar ? partLayoutObject->size().width() : partLayoutObject->size().height();
 }
 
 void LayoutScrollbar::invalidateDisplayItemClientsOfScrollbarParts(const LayoutBoxModelObject& paintInvalidationContainer, const LayoutRect& paintInvalidationRect)
 {
     for (auto& part : m_parts)
         part.value->invalidateDisplayItemClientsIncludingNonCompositingDescendants(&paintInvalidationContainer, PaintInvalidationScroll, &paintInvalidationRect);
 }
 
 }