Implement SetWrapperReferenceTo idl attribute within traceWrappers for svg elements

third_party/WebKit/Source/core/svg/SVGNumberTearOff.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 {
 
 class SVGNumberTearOff : public SVGPropertyTearOff<SVGNumber>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static SVGNumberTearOff* create(SVGNumber* target, SVGElement* contextElement, PropertyIsAnimValType propertyIsAnimVal, const QualifiedName& attributeName = QualifiedName::null())
     {
         return new SVGNumberTearOff(target, contextElement, propertyIsAnimVal, attributeName);
     }
 
+    DECLARE_VIRTUAL_TRACE_WRAPPERS();
+
     void setValue(float, ExceptionState&);
     float value() { return target()->value(); }
 
 protected:
     SVGNumberTearOff(SVGNumber*, SVGElement* contextElement, PropertyIsAnimValType, const QualifiedName& attributeName = QualifiedName::null());
 };
 
 } // namespace blink
 
 #endif // SVGNumberTearOff_h