Simplify SVGAnimated* initialization

third_party/WebKit/Source/core/svg/SVGAnimatedBoolean.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 25 matching lines @@
 #include "core/svg/properties/SVGAnimatedProperty.h"
 
 namespace blink {
 
 class SVGAnimatedBoolean final : public SVGAnimatedProperty<SVGBoolean>,
                                  public ScriptWrappable {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static SVGAnimatedBoolean* create(SVGElement* contextElement,
-                                    const QualifiedName& attributeName,
-                                    SVGBoolean* initialValue) {
-    return new SVGAnimatedBoolean(contextElement, attributeName, initialValue);
+                                    const QualifiedName& attributeName) {
+    return new SVGAnimatedBoolean(contextElement, attributeName);
   }
 
   DEFINE_INLINE_VIRTUAL_TRACE_WRAPPERS() {
     visitor->traceWrappers(contextElement());
   }
 
  protected:
   SVGAnimatedBoolean(SVGElement* contextElement,
-                     const QualifiedName& attributeName,
-                     SVGBoolean* initialValue)
+                     const QualifiedName& attributeName)
       : SVGAnimatedProperty<SVGBoolean>(contextElement,
                                         attributeName,
-                                        initialValue) {}
+                                        SVGBoolean::create()) {}
 };
 
 }  // namespace blink
 
 #endif  // SVGAnimatedBoolean_h