Clean up toHTMLFooElement() using DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION

Source/core/html/HTMLAreaElement.h

Index: Source/core/html/HTMLAreaElement.h
diff --git a/Source/core/html/HTMLAreaElement.h b/Source/core/html/HTMLAreaElement.h
index b5f22211e0974577f9a6860790f53f669e4f9fa2..67c7a58094e1c2636f3c19efb3fcc41a96cf5195 100644
--- a/Source/core/html/HTMLAreaElement.h
+++ b/Source/core/html/HTMLAreaElement.h
@@ -78,11 +78,7 @@ inline bool isHTMLAreaElement(const Element* element)
     return element->hasTagName(HTMLNames::areaTag);
 }
 
-inline HTMLAreaElement* toHTMLAreaElement(Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLAreaElement(node));
-    return static_cast<HTMLAreaElement*>(node);
-}
+DEFINE_NODE_TYPE_CASTS(HTMLAreaElement, hasTagName(HTMLNames::areaTag));
 
 } //namespace