Refactoring: toPluginView and toPluginDocument implemented but not used.

Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * 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.
@@ skipping 45 matching lines @@
     ASSERT(!m_instance); // cleared in detach()
 
     if (m_NPObject) {
         _NPN_ReleaseObject(m_NPObject);
         m_NPObject = 0;
     }
 }
 
 bool HTMLPlugInElement::canProcessDrag() const
 {
-    const PluginView* plugin = pluginWidget() && pluginWidget()->isPluginView() ? static_cast<const PluginView*>(pluginWidget()) : 0;
+    const PluginView* plugin = pluginWidget() && pluginWidget()->isPluginView() ? toPluginView(pluginWidget()) : 0;
     return plugin ? plugin->canProcessDrag() : false;
 }
 
 bool HTMLPlugInElement::willRespondToMouseClickEvents()
 {
     if (isDisabledFormControl())
         return false;
     RenderObject* r = renderer();
     if (!r)
         return false;
@@ skipping 136 matching lines @@
 {
     document().updateLayoutIgnorePendingStylesheets();
     return existingRenderWidget();
 }
 
 bool HTMLPlugInElement::isKeyboardFocusable() const
 {
     if (!document().page())
         return false;
 
-    const PluginView* plugin = pluginWidget() && pluginWidget()->isPluginView() ? static_cast<const PluginView*>(pluginWidget()) : 0;
+    const PluginView* plugin = pluginWidget() && pluginWidget()->isPluginView() ? toPluginView(pluginWidget()) : 0;
     if (plugin)
         return plugin->supportsKeyboardFocus();
 
     return false;
 }
 
 bool HTMLPlugInElement::isPluginElement() const
 {
     return true;
 }
@@ skipping 10 matching lines @@
 
 NPObject* HTMLPlugInElement::getNPObject()
 {
     ASSERT(document().frame());
     if (!m_NPObject)
         m_NPObject = document().frame()->script()->createScriptObjectForPluginElement(this);
     return m_NPObject;
 }
 
 }