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

Source/core/svg/SVGGradientElement.cpp

Index: Source/core/svg/SVGGradientElement.cpp
diff --git a/Source/core/svg/SVGGradientElement.cpp b/Source/core/svg/SVGGradientElement.cpp
index 92b1da6ccbd8dfc6bdc597270e668a1e72a97054..556b540996c62053ba3fccddb0db3a93ba54823c 100644
--- a/Source/core/svg/SVGGradientElement.cpp
+++ b/Source/core/svg/SVGGradientElement.cpp
@@ -104,11 +104,11 @@ void SVGGradientElement::svgAttributeChanged(const QualifiedName& attrName)
         renderer->invalidateCacheAndMarkForLayout();
 }
 
-void SVGGradientElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
+void SVGGradientElement::childrenChanged(const ChildrenChange& change)
 {
-    SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
+    SVGElement::childrenChanged(change);
 
-    if (changedByParser)
+    if (change.byParser)
         return;
 
     if (RenderObject* object = renderer())