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 6a27aaead144d0faca8f577e026e5d30c062ea33..2631c9abbc53480bb5c3383995b7d604916e27f0 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
@@ -894,6 +895,11 @@ public:
 
     unsigned tabSize() const { return rareInheritedData->m_tabSize; }
 
+    StyleNavigationValue navDown() const { return rareNonInheritedData->m_navigation->down(); }
+    StyleNavigationValue navLeft() const { return rareNonInheritedData->m_navigation->left(); }
+    StyleNavigationValue navRight() const { return rareNonInheritedData->m_navigation->right(); }
+    StyleNavigationValue navUp() const { return rareNonInheritedData->m_navigation->up(); }
+
     // End CSS3 Getters
 
     WrapFlow wrapFlow() const { return static_cast<WrapFlow>(rareNonInheritedData->m_wrapFlow); }
@@ -1362,6 +1368,10 @@ public:
 
     void setTabSize(unsigned size) { SET_VAR(rareInheritedData, m_tabSize, size); }
 
+    void setNavDown(const StyleNavigationValue& value) { SET_VAR_WITH_SETTER(rareNonInheritedData.access()->m_navigation, down, setDown, value); }
+    void setNavLeft(const StyleNavigationValue& value) { SET_VAR_WITH_SETTER(rareNonInheritedData.access()->m_navigation, left, setLeft, value); }
+    void setNavRight(const StyleNavigationValue& value) { SET_VAR_WITH_SETTER(rareNonInheritedData.access()->m_navigation, right, setRight, value); }
+    void setNavUp(const StyleNavigationValue& value) { SET_VAR_WITH_SETTER(rareNonInheritedData.access()->m_navigation, up, setUp, value); }
     // End CSS3 Setters
 
     void setWrapFlow(WrapFlow wrapFlow) { SET_VAR(rareNonInheritedData, m_wrapFlow, wrapFlow); }
@@ -1688,7 +1698,7 @@ public:
     static ShadowList* initialTextShadow() { return 0; }
     static ScrollBehavior initialScrollBehavior() { return ScrollBehaviorInstant; }
 
-    // The initial value is 'none' for grid tracks.
+    // The initial value is 'none' for grid trac  ks.
     static Vector<GridTrackSize> initialGridTemplateColumns() { return Vector<GridTrackSize>(); }
     static Vector<GridTrackSize> initialGridTemplateRows() { return Vector<GridTrackSize>(); }
 
@@ -1719,6 +1729,8 @@ 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(); }