Generate toFooElement() functions from tagname data

Source/core/svg/SVGLinearGradientElement.h

Index: Source/core/svg/SVGLinearGradientElement.h
diff --git a/Source/core/svg/SVGLinearGradientElement.h b/Source/core/svg/SVGLinearGradientElement.h
index 7f5f5ebe6ab23266d142b90fcb2332cddd881599..bd3683a7625b4cabbee51e5eb4c2583ac8a25bea 100644
--- a/Source/core/svg/SVGLinearGradientElement.h
+++ b/Source/core/svg/SVGLinearGradientElement.h
@@ -21,7 +21,6 @@
 #ifndef SVGLinearGradientElement_h
 #define SVGLinearGradientElement_h
 
-#include "SVGNames.h"
 #include "core/svg/SVGAnimatedLength.h"
 #include "core/svg/SVGGradientElement.h"
 
@@ -54,12 +53,6 @@ private:
     END_DECLARE_ANIMATED_PROPERTIES
 };
 
-inline SVGLinearGradientElement* toSVGLinearGradientElement(Node* node)
-{
-    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(SVGNames::linearGradientTag));
-    return static_cast<SVGLinearGradientElement*>(node);
-}
-
 } // namespace WebCore
 
 #endif