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

Source/core/html/HTMLFrameSetElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann (hausmann@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2009, 2010 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
@@ skipping 146 matching lines @@
 }
 
 RenderObject *HTMLFrameSetElement::createRenderer(RenderArena *arena, RenderStyle *style)
 {
     if (style->hasContent())
         return RenderObject::createObject(this, style);
     
     return new (arena) RenderFrameSet(this);
 }
 
-void HTMLFrameSetElement::attach()
+void HTMLFrameSetElement::attach(const AttachContext& context)
 {
     // Inherit default settings from parent frameset
     // FIXME: This is not dynamic.
     for (ContainerNode* node = parentNode(); node; node = node->parentNode()) {
         if (node->hasTagName(framesetTag)) {
             HTMLFrameSetElement* frameset = static_cast<HTMLFrameSetElement*>(node);
             if (!m_frameborderSet)
                 m_frameborder = frameset->hasFrameBorder();
             if (m_frameborder) {
                 if (!m_borderSet)
                     m_border = frameset->border();
                 if (!m_borderColorSet)
                     m_borderColorSet = frameset->hasBorderColor();
             }
             if (!m_noresize)
                 m_noresize = frameset->noResize();
             break;
         }
     }
 
-    HTMLElement::attach();
+    HTMLElement::attach(context);
 }
 
 void HTMLFrameSetElement::defaultEventHandler(Event* evt)
 {
     if (evt->isMouseEvent() && !m_noresize && renderer() && renderer()->isFrameSet()) {
         if (toRenderFrameSet(renderer())->userResize(static_cast<MouseEvent*>(evt))) {
             evt->setDefaultHandled();
             return;
         }
     }
@@ skipping 22 matching lines @@
     Node* frameNode = children()->namedItem(name);
     if (!frameNode || !frameNode->hasTagName(HTMLNames::frameTag))
         return 0;
     Document* document = static_cast<HTMLFrameElement*>(frameNode)->contentDocument();
     if (!document || !document->frame())
         return 0;
     return document->domWindow();
 }
 
 } // namespace WebCore