Adding support for ARIA 1.1 role="none"

Source/core/accessibility/AXObject.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 77 matching lines @@
         { "main", MainRole },
         { "marquee", MarqueeRole },
         { "math", MathRole },
         { "menu", MenuRole },
         { "menubar", MenuBarRole },
         { "menuitem", MenuItemRole },
         { "menuitemcheckbox", MenuItemRole },
         { "menuitemradio", MenuItemRole },
         { "note", NoteRole },
         { "navigation", NavigationRole },
+        { "none", NoneRole },
         { "option", ListBoxOptionRole },
         { "presentation", PresentationalRole },
         { "progressbar", ProgressIndicatorRole },
         { "radio", RadioButtonRole },
         { "radiogroup", RadioGroupRole },
         { "region", RegionRole },
         { "row", RowRole },
         { "scrollbar", ScrollBarRole },
         { "search", SearchRole },
         { "separator", SplitterRole },
@@ skipping 785 matching lines @@
         return ToggleButtonRole;
     if (ariaHasPopup())
         return PopUpButtonRole;
     // We don't contemplate RadioButtonRole, as it depends on the input
     // type.
 
     return ButtonRole;
 }
 
 } // namespace blink