Mark Supplement instead of RefCountedSupplement in NavigatorContentUtils

Source/modules/navigatorcontentutils/NavigatorContentUtils.h

 /*
  * Copyright (C) 2011, Google Inc. All rights reserved.
  * Copyright (C) 2012, Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 20 matching lines @@
 #include "platform/RefCountedSupplement.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class ExceptionState;
 class Navigator;
 class Page;
 
-class NavigatorContentUtils FINAL : public RefCountedSupplement<Page, NavigatorContentUtils> {
+class NavigatorContentUtils FINAL : public Supplement<Page> {
 public:
     virtual ~NavigatorContentUtils();
 
+    static NavigatorContentUtils* from(Page&);
     static const char* supplementName();
-    static NavigatorContentUtils* from(Page&);
 
     static void registerProtocolHandler(Navigator&, const String& scheme, const String& url, const String& title, ExceptionState&);
 
     static String isProtocolHandlerRegistered(Navigator&, const String& scheme, const String& url, ExceptionState&);
     static void unregisterProtocolHandler(Navigator&, const String& scheme, const String& url, ExceptionState&);
 
-    static PassRefPtr<NavigatorContentUtils> create(PassOwnPtr<NavigatorContentUtilsClient>);
+    static PassOwnPtr<NavigatorContentUtils> create(PassOwnPtr<NavigatorContentUtilsClient>);
+
+    virtual void trace(Visitor*) OVERRIDE { }
 
 private:
     explicit NavigatorContentUtils(PassOwnPtr<NavigatorContentUtilsClient> client)
         : m_client(client)
     { }
 
     NavigatorContentUtilsClient* client() { return m_client.get(); }
 
     OwnPtr<NavigatorContentUtilsClient> m_client;
 };
 
 } // namespace WebCore
 
 #endif // NavigatorContentUtils_h