:hover style not applied on hover if its display property is different from original style's

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 61 matching lines @@
     if (isDisabledFormControl())
         return false;
     RenderObject* r = renderer();
     if (!r)
         return false;
     if (!r->isEmbeddedObject() && !r->isWidget())
         return false;
     return true;
 }
 
-void HTMLPlugInElement::detach()
+void HTMLPlugInElement::detach(const AttachContext& context)
 {
     m_instance.clear();
 
     if (m_isCapturingMouseEvents) {
         if (Frame* frame = document()->frame())
             frame->eventHandler()->setCapturingMouseEventsNode(0);
         m_isCapturingMouseEvents = false;
     }
 
     if (m_NPObject) {
         _NPN_ReleaseObject(m_NPObject);
         m_NPObject = 0;
     }
 
-    HTMLFrameOwnerElement::detach();
+    HTMLFrameOwnerElement::detach(context);
 }
 
 void HTMLPlugInElement::resetInstance()
 {
     m_instance.clear();
 }
 
 PassScriptInstance HTMLPlugInElement::getInstance()
 {
     Frame* frame = document()->frame();
@@ skipping 122 matching lines @@
 
 NPObject* HTMLPlugInElement::getNPObject()
 {
     ASSERT(document()->frame());
     if (!m_NPObject)
         m_NPObject = document()->frame()->script()->createScriptObjectForPluginElement(this);
     return m_NPObject;
 }
 
 }