Use toSVGMarkerElement() instead of static_cast<>

Source/core/svg/SVGMarkerElement.h

Index: Source/core/svg/SVGMarkerElement.h
diff --git a/Source/core/svg/SVGMarkerElement.h b/Source/core/svg/SVGMarkerElement.h
index 71593e7d74def0f5078ba1125bc7889cbb1625d0..df6a0c55a59fba803a9f23b948148b1182e0ba7a 100644
--- a/Source/core/svg/SVGMarkerElement.h
+++ b/Source/core/svg/SVGMarkerElement.h
@@ -164,10 +164,10 @@ private:
     mutable SVGSynchronizableAnimatedProperty<SVGMarkerOrientType> m_orientType;
 };
 
-inline SVGMarkerElement* toSVGMarkerElement(SVGElement* element)
+inline SVGMarkerElement* toSVGMarkerElement(Node* node)
 {
-    ASSERT_WITH_SECURITY_IMPLICATION(!element || element->hasTagName(SVGNames::markerTag));
-    return static_cast<SVGMarkerElement*>(element);
+    ASSERT_WITH_SECURITY_IMPLICATION(!node || node->hasTagName(SVGNames::markerTag));
+    return static_cast<SVGMarkerElement*>(node);
 }
 
 }