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

Source/core/svg/SVGFontFaceFormatElement.h

Index: Source/core/svg/SVGFontFaceFormatElement.h
diff --git a/Source/core/svg/SVGFontFaceFormatElement.h b/Source/core/svg/SVGFontFaceFormatElement.h
index ae0df13ff42aff440a6753535abcdc1ce8e49714..e38d89b799dc9743414a47b06dd6808081da3e38 100644
--- a/Source/core/svg/SVGFontFaceFormatElement.h
+++ b/Source/core/svg/SVGFontFaceFormatElement.h
@@ -32,7 +32,7 @@ public:
 private:
     explicit SVGFontFaceFormatElement(Document&);
 
-    virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
+    virtual void childrenChanged(const ChildrenChange&) OVERRIDE;
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE { return false; }
 };