Replace elementHasLegalLinkAttribute() helper with virtual function

Source/core/html/HTMLScriptElement.cpp

Index: Source/core/html/HTMLScriptElement.cpp
diff --git a/Source/core/html/HTMLScriptElement.cpp b/Source/core/html/HTMLScriptElement.cpp
index 50afbd1463d6b7201c4c8a92c75ec7dba101c05b..4979f9e0612282461d384eed1b842c5e7bde0428 100644
--- a/Source/core/html/HTMLScriptElement.cpp
+++ b/Source/core/html/HTMLScriptElement.cpp
@@ -54,6 +54,11 @@ bool HTMLScriptElement::isURLAttribute(const Attribute& attribute) const
     return attribute.name() == srcAttr || HTMLElement::isURLAttribute(attribute);
 }
 
+bool HTMLScriptElement::hasLegalLinkAttribute(const QualifiedName& name) const
+{
+    return name == srcAttr || HTMLElement::hasLegalLinkAttribute(name);
+}
+
 void HTMLScriptElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
 {
     HTMLElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);