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

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index 0c406ddee3166c9a5d611f06c026ebc34d32ec4e..9f259627f4c0ab285ac08b631dbb19c5dfa374b9 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -2,6 +2,7 @@
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
+ * Copyright (C) 2013 Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -3480,6 +3481,11 @@ void EventHandler::defaultArrowEventHandler(FocusType focusType, KeyboardEvent*
     if (m_frame->document()->inDesignMode())
         return;
 
+    if (page->focusController().handleCSSFocusNavigation(focusType)) {
+        event->setDefaultHandled();
+        return;
+    }
+
     if (page->focusController().advanceFocus(focusType))
         event->setDefaultHandled();
 }