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

Source/core/html/HTMLPlugInImageElement.cpp

 /*
  * Copyright (C) 2008, 2011, 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
@@ skipping 141 matching lines @@
     return new (arena) RenderEmbeddedObject(this);
 }
 
 void HTMLPlugInImageElement::willRecalcStyle(StyleChange)
 {
     // FIXME: Why is this necessary?  Manual re-attach is almost always wrong.
     if (!useFallbackContent() && needsWidgetUpdate() && renderer() && !isImageType())
         reattach();
 }
 
-void HTMLPlugInImageElement::attach()
+void HTMLPlugInImageElement::attach(const AttachContext& context)
 {
     PostAttachCallbackDisabler disabler(this);
 
     bool isImage = isImageType();
     
     if (!isImage)
         queuePostAttachCallback(&HTMLPlugInImageElement::updateWidgetCallback, this);
 
-    HTMLPlugInElement::attach();
+    HTMLPlugInElement::attach(context);
 
     if (isImage && renderer() && !useFallbackContent()) {
         if (!m_imageLoader)
             m_imageLoader = adoptPtr(new HTMLImageLoader(this));
         m_imageLoader->updateFromElement();
     }
 }
 
-void HTMLPlugInImageElement::detach()
+void HTMLPlugInImageElement::detach(const AttachContext& context)
 {
     // FIXME: Because of the insanity that is HTMLPlugInImageElement::recalcStyle,
     // we can end up detaching during an attach() call, before we even have a
     // renderer.  In that case, don't mark the widget for update.
     if (attached() && renderer() && !useFallbackContent())
         // Update the widget the next time we attach (detaching destroys the plugin).
         setNeedsWidgetUpdate(true);
-    HTMLPlugInElement::detach();
+    HTMLPlugInElement::detach(context);
 }
 
 void HTMLPlugInImageElement::updateWidgetIfNecessary()
 {
     document()->updateStyleIfNeeded();
 
     if (!needsWidgetUpdate() || useFallbackContent() || isImageType())
         return;
 
     if (!renderEmbeddedObject() || renderEmbeddedObject()->showsUnavailablePluginIndicator())
@@ skipping 27 matching lines @@
 
 void HTMLPlugInImageElement::subframeLoaderWillCreatePlugIn(const KURL& url)
 {
     LOG(Plugins, "%p Plug-in URL: %s", this, m_url.utf8().data());
     LOG(Plugins, "   Loaded URL: %s", url.string().utf8().data());
 
     m_loadedUrl = url;
 }
 
 } // namespace WebCore