Generate toFooElement() functions from tagname data

Source/core/html/HTMLLabelElement.h

Index: Source/core/html/HTMLLabelElement.h
diff --git a/Source/core/html/HTMLLabelElement.h b/Source/core/html/HTMLLabelElement.h
index 1b0007a17b39076a6647e564895288c35f88b0f0..90cb1ea51d3716e081d0bf90d732692b80386434 100644
--- a/Source/core/html/HTMLLabelElement.h
+++ b/Source/core/html/HTMLLabelElement.h
@@ -65,12 +65,6 @@ inline bool isHTMLLabelElement(const Element* element)
     return element->hasTagName(HTMLNames::labelTag);
 }
 
-inline HTMLLabelElement* toHTMLLabelElement(Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || isHTMLLabelElement(node));
-    return static_cast<HTMLLabelElement*>(node);
-}
-
 } //namespace
 
 #endif