bindings: Adds virtual ScriptWrappable::wrap method.

Source/core/testing/RefCountedScriptWrappable.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef RefCountedScriptWrappable_h
 #define RefCountedScriptWrappable_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class RefCountedScriptWrappable : public RefCounted<RefCountedScriptWrappable>, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtr<RefCountedScriptWrappable> create(const String&);
     virtual ~RefCountedScriptWrappable();
 
     const String& toString() const { return m_string; }
 
 protected:
     RefCountedScriptWrappable(const String&);
 
 private:
     String m_string;
 };
 
 } // namespace blink
 
-#endif // #ifndef RefCountedScriptWrappable_h
+#endif // RefCountedScriptWrappable_h