Generate toFooElement() functions from tagname data

Source/core/svg/SVGTextElement.h

Index: Source/core/svg/SVGTextElement.h
diff --git a/Source/core/svg/SVGTextElement.h b/Source/core/svg/SVGTextElement.h
index e90aa833f075d90eb12346f57e3725afe6f374cd..f3970cedf5309e11acb5243191ebab610665421e 100644
--- a/Source/core/svg/SVGTextElement.h
+++ b/Source/core/svg/SVGTextElement.h
@@ -21,7 +21,6 @@
 #ifndef SVGTextElement_h
 #define SVGTextElement_h
 
-#include "SVGNames.h"
 #include "core/svg/SVGTextPositioningElement.h"
 
 namespace WebCore {
@@ -41,12 +40,6 @@ private:
     virtual bool childShouldCreateRenderer(const NodeRenderingContext&) const;
 };
 
-inline SVGTextElement* toSVGTextElement(Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(SVGNames::textTag));
-    return static_cast<SVGTextElement*>(node);
-}
-
 } // namespace WebCore
 
 #endif