Use DEFINE_NODE_TYPE_CASTS instead of using manual toHTMLFooElement()

Source/core/html/HTMLInputElement.h

Index: Source/core/html/HTMLInputElement.h
diff --git a/Source/core/html/HTMLInputElement.h b/Source/core/html/HTMLInputElement.h
index 324e57081200b5b238d83989c4c9f11782c1a791..eba6b9923c5b8b5ce3363bc601a78281b846d1e9 100644
--- a/Source/core/html/HTMLInputElement.h
+++ b/Source/core/html/HTMLInputElement.h
@@ -406,21 +406,7 @@ private:
     OwnPtr<ListAttributeTargetObserver> m_listAttributeTargetObserver;
 };
 
-inline HTMLInputElement* toHTMLInputElement(Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(HTMLNames::inputTag));
-    return static_cast<HTMLInputElement*>(node);
-}
-
-inline const HTMLInputElement* toHTMLInputElement(const Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(HTMLNames::inputTag));
-    return static_cast<const HTMLInputElement*>(node);
-}
-
-// This will catch anyone doing an unnecessary cast.
-void toHTMLElement(const HTMLElement*);
-
+DEFINE_NODE_TYPE_CASTS(HTMLInputElement, hasTagName(HTMLNames::inputTag));
 
 } //namespace
 #endif