Generate toFooElement() functions from tagname data

Source/core/svg/SVGMissingGlyphElement.h

Index: Source/core/svg/SVGMissingGlyphElement.h
diff --git a/Source/core/svg/SVGMissingGlyphElement.h b/Source/core/svg/SVGMissingGlyphElement.h
index a1c4a8f53303e692153cd1b46d42f00f95907283..0b78ce63c72fc7bc36c97a0599401bb25b58ce3e 100644
--- a/Source/core/svg/SVGMissingGlyphElement.h
+++ b/Source/core/svg/SVGMissingGlyphElement.h
@@ -21,7 +21,6 @@
 #define SVGMissingGlyphElement_h
 
 #if ENABLE(SVG_FONTS)
-#include "SVGNames.h"
 #include "core/svg/SVGElement.h"
 
 namespace WebCore {
@@ -36,12 +35,6 @@ private:
     virtual bool rendererIsNeeded(const NodeRenderingContext&) { return false; }
 };
 
-inline SVGMissingGlyphElement* toSVGMissingGlyphElement(Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(SVGNames::missing_glyphTag));
-    return static_cast<SVGMissingGlyphElement*>(node);
-}
-
 } // namespace WebCore
 
 #endif // ENABLE(SVG_FONTS)