Clean up creation of "detached" SVG* data type objects

third_party/WebKit/Source/core/svg/SVGRectTearOff.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 24 matching lines @@
 #include "core/svg/properties/SVGPropertyTearOff.h"
 #include "platform/bindings/ScriptWrappable.h"
 
 namespace blink {
 
 class SVGRectTearOff : public SVGPropertyTearOff<SVGRect>,
                        public ScriptWrappable {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
-  static SVGRectTearOff* Create(
-      SVGRect* target,
-      SVGElement* context_element,
-      PropertyIsAnimValType property_is_anim_val,
-      const QualifiedName& attribute_name = QualifiedName::Null()) {
+  static SVGRectTearOff* Create(SVGRect* target,
+                                SVGElement* context_element,
+                                PropertyIsAnimValType property_is_anim_val,
+                                const QualifiedName& attribute_name) {
     return new SVGRectTearOff(target, context_element, property_is_anim_val,
                               attribute_name);
   }
+  static SVGRectTearOff* CreateDetached(const FloatRect&);
 
   void setX(float, ExceptionState&);
   void setY(float, ExceptionState&);
   void setWidth(float, ExceptionState&);
   void setHeight(float, ExceptionState&);
   float x() { return Target()->X(); }
   float y() { return Target()->Y(); }
   float width() { return Target()->Width(); }
   float height() { return Target()->Height(); }
 
   DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
  private:
   SVGRectTearOff(SVGRect*,
                  SVGElement* context_element,
                  PropertyIsAnimValType,
-                 const QualifiedName& attribute_name = QualifiedName::Null());
+                 const QualifiedName& attribute_name);
 };
 
 }  // namespace blink
 
 #endif  // SVGRectTearOff_h