Generate toFooElement() functions from tagname data

Source/core/svg/SVGPolylineElement.h

Index: Source/core/svg/SVGPolylineElement.h
diff --git a/Source/core/svg/SVGPolylineElement.h b/Source/core/svg/SVGPolylineElement.h
index fe1a5c078acc2457c914393b1d3e63ebe82cc58a..d1ed475f1b24ead477a186595ce08ab64cd1c11c 100644
--- a/Source/core/svg/SVGPolylineElement.h
+++ b/Source/core/svg/SVGPolylineElement.h
@@ -21,7 +21,6 @@
 #ifndef SVGPolylineElement_h
 #define SVGPolylineElement_h
 
-#include "SVGNames.h"
 #include "core/svg/SVGPolyElement.h"
 
 namespace WebCore {
@@ -34,12 +33,6 @@ private:
     SVGPolylineElement(const QualifiedName&, Document&);
 };
 
-inline SVGPolylineElement* toSVGPolylineElement(Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(SVGNames::polylineTag));
-    return static_cast<SVGPolylineElement*>(node);
-}
-
 } // namespace WebCore
 
 #endif