Implements determineAccessibilityRole() instead of roleValue()

Source/modules/accessibility/AXListBox.cpp

 /*
  * Copyright (C) 2008 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 37 matching lines @@
 
 AXListBox::~AXListBox()
 {
 }
 
 PassRefPtr<AXListBox> AXListBox::create(LayoutObject* layoutObject, AXObjectCacheImpl* axObjectCache)
 {
     return adoptRef(new AXListBox(layoutObject, axObjectCache));
 }
 
-AccessibilityRole AXListBox::roleValue() const
+AccessibilityRole AXListBox::determineAccessibilityRole()
 {
-    AccessibilityRole ariaRole = ariaRoleAttribute();
-    if (ariaRole != UnknownRole)
-        return ariaRole;
+    if ((m_ariaRole = determineAriaRoleAttribute()) != UnknownRole)
+        return m_ariaRole;
+
     return ListBoxRole;
 }
 
 AXObject* AXListBox::activeDescendant() const
 {
     if (!isHTMLSelectElement(node()))
         return nullptr;
 
     HTMLSelectElement* select = toHTMLSelectElement(node());
     int activeIndex = select->activeSelectionEndListIndex();
@@ skipping 21 matching lines @@
 
     if (m_activeIndex >= 0 && m_activeIndex < static_cast<int>(select->length())) {
         HTMLOptionElement* option = select->item(m_activeIndex);
         axObjectCache()->postNotification(option, AXObjectCacheImpl::AXFocusedUIElementChanged);
     } else {
         axObjectCache()->postNotification(this, AXObjectCacheImpl::AXFocusedUIElementChanged);
     }
 }
 
 } // namespace blink