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

Source/core/html/HTMLImageElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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.
@@ skipping 72 matching lines @@
 
     virtual void didMoveToNewDocument(Document* oldDocument) OVERRIDE;
 
 private:
     virtual bool areAuthorShadowsAllowed() const OVERRIDE { return false; }
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
 
-    virtual void attach();
+    virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
 
     virtual bool canStartSelection() const;
 
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
 
     virtual bool draggable() const;
 
     virtual void addSubresourceAttributeURLs(ListHashSet<KURL>&) const;
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
     virtual bool shouldRegisterAsNamedItem() const OVERRIDE { return true; }
     virtual bool shouldRegisterAsExtraNamedItem() const OVERRIDE { return true; }
 
     HTMLImageLoader m_imageLoader;
     HTMLFormElement* m_form;
     CompositeOperator m_compositeOperator;
 };
 
 } //namespace
 
 #endif