Fire AX notifications on list box options.

Source/modules/accessibility/AXObjectCacheImpl.h

 /*
  * Copyright (C) 2014, Google 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 49 matching lines @@
 
     explicit AXObjectCacheImpl(Document&);
     ~AXObjectCacheImpl();
 
     AXObject* focusedUIElementForPage(const Page*);
 
     virtual void selectionChanged(Node*) override;
     virtual void childrenChanged(Node*) override;
     virtual void childrenChanged(LayoutObject*) override;
     virtual void checkedStateChanged(Node*) override;
-    virtual void selectedChildrenChanged(Node*) override;
+    virtual void listboxOptionStateChanged(HTMLOptionElement*);
+    virtual void listboxSelectedChildrenChanged(HTMLSelectElement*);
+    virtual void listboxActiveIndexChanged(HTMLSelectElement*);
 
     virtual void remove(LayoutObject*) override;
     virtual void remove(Node*) override;
     virtual void remove(Widget*) override;
 
     virtual const Element* rootAXEditableElement(const Node*) override;
 
     // Called by a node when text or a text equivalent (e.g. alt) attribute is changed.
     virtual void textChanged(LayoutObject*) override;
     // Called when a node has just been attached, so we can make sure we have the right subclass of AXObject.
@@ skipping 47 matching lines @@
     AXObject* get(LayoutObject*);
     AXObject* get(Widget*);
     AXObject* get(AbstractInlineTextBox*);
 
     AXObject* firstAccessibleObjectFromNode(const Node*);
 
     void remove(AXID);
     void remove(AbstractInlineTextBox*);
 
     void childrenChanged(AXObject*);
-    void selectedChildrenChanged(LayoutObject*);
-    void selectedChildrenChanged(AXObject*);
 
     void handleActiveDescendantChanged(Node*);
     void handleAriaRoleChanged(Node*);
     void handleAriaExpandedChange(Node*);
+    void handleAriaSelectedChanged(Node*);
 
     void recomputeIsIgnored(LayoutObject*);
 
     bool accessibilityEnabled();
     bool inlineTextBoxAccessibilityEnabled();
 
     void removeAXID(AXObject*);
     bool isIDinUse(AXID id) const { return m_idsInUse.contains(id); }
 
     AXID platformGenerateAXID() const;
@@ skipping 49 matching lines @@
 // This is the only subclass of AXObjectCache.
 DEFINE_TYPE_CASTS(AXObjectCacheImpl, AXObjectCache, cache, true, true);
 
 bool nodeHasRole(Node*, const String& role);
 // This will let you know if aria-hidden was explicitly set to false.
 bool isNodeAriaVisible(Node*);
 
 }
 
 #endif