Adding support for ARIA 1.1 role="none"

Source/core/accessibility/AXNodeObject.cpp

Index: Source/core/accessibility/AXNodeObject.cpp
diff --git a/Source/core/accessibility/AXNodeObject.cpp b/Source/core/accessibility/AXNodeObject.cpp
index 7f663aa8817b6fbc4f92b07476e72f44139da862..96164befa089b7094f7aeb8d3854c5b22a52e669 100644
--- a/Source/core/accessibility/AXNodeObject.cpp
+++ b/Source/core/accessibility/AXNodeObject.cpp
@@ -244,8 +244,8 @@ AccessibilityRole AXNodeObject::determineAriaRoleAttribute() const
 
     AccessibilityRole role = ariaRoleToWebCoreRole(ariaRole);
 
-    // ARIA states if an item can get focus, it should not be presentational.
-    if (role == PresentationalRole && canSetFocusAttribute())
+    // ARIA states if an item can get focus, it should not be none or presentational.
+    if ((role == NoneRole || role == PresentationalRole) && canSetFocusAttribute())
         return UnknownRole;
 
     if (role == ButtonRole)