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

Source/core/html/HTMLElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009 Apple Inc. All rights reserved.
  *
  * 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.
  *
@@ skipping 89 matching lines @@
     void addHTMLColorToStyle(MutableStylePropertySet*, CSSPropertyID, const String& color);
 
     void applyAlignmentAttributeToStyle(const AtomicString&, MutableStylePropertySet*);
     void applyBorderAttributeToStyle(const AtomicString&, MutableStylePropertySet*);
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
     unsigned parseBorderWidthAttribute(const AtomicString&) const;
 
-    virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
+    virtual void childrenChanged(const ChildrenChange&) OVERRIDE;
     void calculateAndAdjustDirectionality();
 
 private:
     virtual String nodeName() const OVERRIDE FINAL;
 
     void mapLanguageAttributeToLocale(const AtomicString&, MutableStylePropertySet*);
 
     PassRefPtrWillBeRawPtr<DocumentFragment> textToFragment(const String&, ExceptionState&);
 
     void dirAttributeChanged(const AtomicString&);
     void adjustDirectionalityIfNeededAfterChildAttributeChanged(Element* child);
-    void adjustDirectionalityIfNeededAfterChildrenChanged(Node* beforeChange, int childCountDelta);
+    void adjustDirectionalityIfNeededAfterChildrenChanged(const ChildrenChange&);
     TextDirection directionality(Node** strongDirectionalityTextNode= 0) const;
 
     TranslateAttributeMode translateAttributeMode() const;
 
     void handleKeypressEvent(KeyboardEvent*);
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(HTMLElement, isHTMLElement());
 
 template <> inline bool isElementOfType<const HTMLElement>(const Node& node) { return node.isHTMLElement(); }
@@ skipping 19 matching lines @@
     template<typename T> inline bool is##thisType(const PassRefPtr<T>& node) { return is##thisType(node.get()); } \
     template<typename T> inline bool is##thisType(const RefPtr<T>& node) { return is##thisType(node.get()); } \
     template <> inline bool isElementOfType<const thisType>(const HTMLElement& element) { return is##thisType(element); } \
     DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType)
 
 } // namespace WebCore
 
 #include "core/HTMLElementTypeHelpers.h"
 
 #endif // HTMLElement_h