Pass a struct to ContainerNode::childrenChanged() instead of separate arguments

Source/core/svg/SVGPatternElement.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 49 matching lines @@
 
 private:
     explicit SVGPatternElement(Document&);
 
     virtual bool isValid() const OVERRIDE { return SVGTests::isValid(); }
     virtual bool needsPendingResourceHandling() const OVERRIDE { return false; }
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual void svgAttributeChanged(const QualifiedName&) OVERRIDE;
-    virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
+    virtual void childrenChanged(const ChildrenChange&) OVERRIDE;
 
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
 
     virtual bool selfHasRelativeLengths() const OVERRIDE;
 
     RefPtr<SVGAnimatedLength> m_x;
     RefPtr<SVGAnimatedLength> m_y;
     RefPtr<SVGAnimatedLength> m_width;
     RefPtr<SVGAnimatedLength> m_height;
     RefPtr<SVGAnimatedTransformList> m_patternTransform;
     RefPtr<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType> > m_patternUnits;
     RefPtr<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType> > m_patternContentUnits;
 };
 
 } // namespace WebCore
 
 #endif