Revert of Limit the usage of SharedPersistent to ScriptValue only

Source/core/html/HTMLPlugInElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef HTMLPlugInElement_h
 #define HTMLPlugInElement_h
 
-#include "bindings/v8/ScriptValue.h"
+#include "bindings/v8/SharedPersistent.h"
 #include "core/html/HTMLFrameOwnerElement.h"
 
 struct NPObject;
 
 namespace WebCore {
 
 class HTMLImageLoader;
 class RenderEmbeddedObject;
 class RenderWidget;
 class Widget;
 
 enum PreferPlugInsForImagesOption {
     ShouldPreferPlugInsForImages,
     ShouldNotPreferPlugInsForImages
 };
 
 class HTMLPlugInElement : public HTMLFrameOwnerElement {
 public:
     virtual ~HTMLPlugInElement();
 
     void resetInstance();
-    ScriptValue pluginWrapper();
+    SharedPersistent<v8::Object>* pluginWrapper();
     Widget* pluginWidget() const;
     NPObject* getNPObject();
     bool canProcessDrag() const;
     const String& url() const { return m_url; }
 
     // Public for FrameView::addWidgetToUpdate()
     bool needsWidgetUpdate() const { return m_needsWidgetUpdate; }
     void setNeedsWidgetUpdate(bool needsWidgetUpdate) { m_needsWidgetUpdate = needsWidgetUpdate; }
     void updateWidget();
 
@@ skipping 60 matching lines @@
         RestartingWithPendingMouseClick,
         Playing
     };
     DisplayState displayState() const { return m_displayState; }
     void setDisplayState(DisplayState state) { m_displayState = state; }
     const String loadedMimeType() const;
     bool loadPlugin(const KURL&, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback);
     bool pluginIsLoadable(const KURL&, const String& mimeType);
     bool wouldLoadAsNetscapePlugin(const String& url, const String& serviceType);
 
-    mutable ScriptValue m_pluginWrapper;
+    mutable RefPtr<SharedPersistent<v8::Object> > m_pluginWrapper;
     NPObject* m_NPObject;
     bool m_isCapturingMouseEvents;
     bool m_inBeforeLoadEventHandler;
     bool m_needsWidgetUpdate;
     bool m_shouldPreferPlugInsForImages;
     DisplayState m_displayState;
 };
 
 DEFINE_NODE_TYPE_CASTS(HTMLPlugInElement, isPluginElement());
 
 } // namespace WebCore
 
 #endif // HTMLPlugInElement_h