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

Source/core/rendering/style/StyleRareNonInheritedData.cpp

Index: Source/core/rendering/style/StyleRareNonInheritedData.cpp
diff --git a/Source/core/rendering/style/StyleRareNonInheritedData.cpp b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
index a9f24c783702fe4f50fa915ddea9065b9c3da337..454e7198ac5ad2c853752ee0c9d8c42f3d83e97d 100644
--- a/Source/core/rendering/style/StyleRareNonInheritedData.cpp
+++ b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * 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
@@ -115,6 +116,7 @@ StyleRareNonInheritedData::StyleRareNonInheritedData(const StyleRareNonInherited
     , m_transitions(o.m_transitions ? adoptPtrWillBeNoop(new CSSAnimationDataList(*o.m_transitions)) : nullptr)
     , m_mask(o.m_mask)
     , m_maskBoxImage(o.m_maskBoxImage)
+    , m_navigation(o.m_navigation ? adoptPtr(new StyleNavigationData(*o.m_navigation)) : nullptr)
     , m_pageSize(o.m_pageSize)
     , m_shapeOutside(o.m_shapeOutside)
     , m_shapeMargin(o.m_shapeMargin)
@@ -193,6 +195,7 @@ bool StyleRareNonInheritedData::operator==(const StyleRareNonInheritedData& o) c
         && reflectionDataEquivalent(o)
         && animationDataEquivalent(o)
         && transitionDataEquivalent(o)
+        && navigationDataEquivalent(o)
         && m_mask == o.m_mask
         && m_maskBoxImage == o.m_maskBoxImage
         && m_pageSize == o.m_pageSize
@@ -254,6 +257,14 @@ bool StyleRareNonInheritedData::contentDataEquivalent(const StyleRareNonInherite
     return !a && !b;
 }
 
+bool StyleRareNonInheritedData::navigationDataEquivalent(const StyleRareNonInheritedData& o) const
+{
+    StyleNavigationData* a = m_navigation.get();
+    StyleNavigationData* b = o.m_navigation.get();
+
+    return a && b && *a == *b;
+}
+
 bool StyleRareNonInheritedData::counterDataEquivalent(const StyleRareNonInheritedData& o) const
 {
     if (m_counterDirectives.get() == o.m_counterDirectives.get())