Implementation of CSS3 nav-up/down/left/right properties from CSS3 UI.

Source/core/rendering/style/StyleRareNonInheritedData.h

Index: Source/core/rendering/style/StyleRareNonInheritedData.h
diff --git a/Source/core/rendering/style/StyleRareNonInheritedData.h b/Source/core/rendering/style/StyleRareNonInheritedData.h
index 52dcecad941fbf2ba1f947fb7ba96c7399d1322e..1cdfaf6f9be16d69fc1a3a134cb52193f8853e33 100644
--- a/Source/core/rendering/style/StyleRareNonInheritedData.h
+++ b/Source/core/rendering/style/StyleRareNonInheritedData.h
@@ -4,6 +4,7 @@
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
+ * Copyright (C) 2013 Opera Software ASA. 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
@@ -36,6 +37,7 @@
 #include "core/rendering/style/NinePieceImage.h"
 #include "core/rendering/style/RenderStyleConstants.h"
 #include "core/rendering/style/ShapeValue.h"
+#include "core/rendering/style/StyleNavigationData.h"
 #include "platform/LengthPoint.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassRefPtr.h"
@@ -86,6 +88,7 @@ public:
     bool shadowDataEquivalent(const StyleRareNonInheritedData&) const;
     bool reflectionDataEquivalent(const StyleRareNonInheritedData&) const;
     bool animationDataEquivalent(const StyleRareNonInheritedData&) const;
+    bool navigationDataEquivalent(const StyleRareNonInheritedData&) const;
     bool transitionDataEquivalent(const StyleRareNonInheritedData&) const;
     bool hasFilters() const;
     bool hasOpacity() const { return opacity < 1; }
@@ -127,6 +130,8 @@ public:
     FillLayer m_mask;
     NinePieceImage m_maskBoxImage;
 
+    OwnPtr<StyleNavigationData> m_navigation;
+
     LengthSize m_pageSize;
 
     RefPtr<ShapeValue> m_shapeOutside;