Simplify SVGAnimated* initialization

third_party/WebKit/Source/core/svg/SVGAnimatedNumberList.h

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 namespace blink {
 
 // SVG Spec:
 // http://www.w3.org/TR/SVG11/types.html#InterfaceSVGAnimatedNumberList
 class SVGAnimatedNumberList final : public SVGAnimatedProperty<SVGNumberList>,
                                     public ScriptWrappable {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static SVGAnimatedNumberList* create(SVGElement* contextElement,
-                                       const QualifiedName& attributeName,
-                                       SVGNumberList* initialValue) {
-    return new SVGAnimatedNumberList(contextElement, attributeName,
-                                     initialValue);
+                                       const QualifiedName& attributeName) {
+    return new SVGAnimatedNumberList(contextElement, attributeName);
   }
 
   DEFINE_INLINE_VIRTUAL_TRACE_WRAPPERS() {
     visitor->traceWrappers(contextElement());
   }
 
  protected:
   SVGAnimatedNumberList(SVGElement* contextElement,
-                        const QualifiedName& attributeName,
-                        SVGNumberList* initialValue)
+                        const QualifiedName& attributeName)
       : SVGAnimatedProperty<SVGNumberList>(contextElement,
                                            attributeName,
-                                           initialValue) {}
+                                           SVGNumberList::create()) {}
 };
 
 }  // namespace blink
 
 #endif