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

Source/core/html/HTMLFieldSetElement.cpp

Index: Source/core/html/HTMLFieldSetElement.cpp
diff --git a/Source/core/html/HTMLFieldSetElement.cpp b/Source/core/html/HTMLFieldSetElement.cpp
index 54f6d7bbb93e27caae875acd812cb06060b13c13..ee1d73ed6c15f757e1c60516763f8555702de360 100644
--- a/Source/core/html/HTMLFieldSetElement.cpp
+++ b/Source/core/html/HTMLFieldSetElement.cpp
@@ -73,9 +73,9 @@ void HTMLFieldSetElement::disabledAttributeChanged()
     invalidateDisabledStateUnder(*this);
 }
 
-void HTMLFieldSetElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
+void HTMLFieldSetElement::childrenChanged(const ChildrenChange& change)
 {
-    HTMLFormControlElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
+    HTMLFormControlElement::childrenChanged(change);
     for (HTMLLegendElement* legend = Traversal<HTMLLegendElement>::firstChild(*this); legend; legend = Traversal<HTMLLegendElement>::nextSibling(*legend))
         invalidateDisabledStateUnder(*legend);
 }