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

Source/core/rendering/style/RenderStyle.h

Index: Source/core/rendering/style/RenderStyle.h
diff --git a/Source/core/rendering/style/RenderStyle.h b/Source/core/rendering/style/RenderStyle.h
index 8474a7ff7cecd4685e598a5e9463095ee981c207..2ca7ee7891ec4ea910a5abd70a7af7ebb21980a2 100644
--- a/Source/core/rendering/style/RenderStyle.h
+++ b/Source/core/rendering/style/RenderStyle.h
@@ -4,6 +4,7 @@
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
+ * Copyright (C) 2014 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
@@ -892,6 +893,11 @@ public:
 
     unsigned tabSize() const { return rareInheritedData->m_tabSize; }
 
+    StyleNavigationValue navDown() const { return rareNonInheritedData->navDown(); }
+    StyleNavigationValue navLeft() const { return rareNonInheritedData->navLeft(); }
+    StyleNavigationValue navRight() const { return rareNonInheritedData->navRight(); }
+    StyleNavigationValue navUp() const { return rareNonInheritedData->navUp(); }
+
     // End CSS3 Getters
 
     WrapFlow wrapFlow() const { return static_cast<WrapFlow>(rareNonInheritedData->m_wrapFlow); }
@@ -1349,6 +1355,10 @@ public:
 
     void setTabSize(unsigned size) { SET_VAR(rareInheritedData, m_tabSize, size); }
 
+    void setNavDown(const StyleNavigationValue& value) { SET_VAR_WITH_SETTER(rareNonInheritedData, navDown, setNavDown, value); }
+    void setNavLeft(const StyleNavigationValue& value) { SET_VAR_WITH_SETTER(rareNonInheritedData, navLeft, setNavLeft, value); }
+    void setNavRight(const StyleNavigationValue& value) { SET_VAR_WITH_SETTER(rareNonInheritedData, navRight, setNavRight, value); }
+    void setNavUp(const StyleNavigationValue& value) { SET_VAR_WITH_SETTER(rareNonInheritedData, navUp, setNavUp, value); }
     // End CSS3 Setters
 
     void setWrapFlow(WrapFlow wrapFlow) { SET_VAR(rareNonInheritedData, m_wrapFlow, wrapFlow); }
@@ -1698,6 +1708,8 @@ public:
 
     static QuotesData* initialQuotes() { return 0; }
 
+    static StyleNavigationValue initialStyleNavigation() { DEFINE_STATIC_LOCAL(StyleNavigationValue, initialNavigation, ()); return initialNavigation; }
+
     // Keep these at the end.
     // FIXME: Why? Seems these should all be one big sorted list.
     static LineClampValue initialLineClamp() { return LineClampValue(); }