Implement select listbox using shadow DOM

Source/core/accessibility/AXListBoxOption.h

 /*
  * 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 11 matching lines @@
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef AXListBoxOption_h
 #define AXListBoxOption_h
 
-#include "core/accessibility/AXObject.h"
+#include "core/accessibility/AXRenderObject.h"
 #include "core/html/HTMLElement.h"
 #include "wtf/Forward.h"
 
 namespace WebCore {
 
 class AXListBox;
 class Element;
 class HTMLElement;
 class HTMLSelectElement;
 
-class AXListBoxOption FINAL : public AXObject {
+class AXListBoxOption FINAL : public AXRenderObject {
 
 private:
-    AXListBoxOption();
+    AXListBoxOption(RenderObject*);
 public:
-    static PassRefPtr<AXListBoxOption> create();
+    static PassRefPtr<AXListBoxOption> create(RenderObject*);
     virtual ~AXListBoxOption();
 
-    void setHTMLElement(HTMLElement* element) { m_optionElement = element; }
-
     virtual AccessibilityRole roleValue() const OVERRIDE { return ListBoxOptionRole; }
     virtual bool isSelected() const OVERRIDE;
     virtual bool isEnabled() const OVERRIDE;
     virtual bool isSelectedOptionActive() const OVERRIDE;
-    virtual String stringValue() const OVERRIDE;
-    virtual Element* actionElement() const OVERRIDE;
-    virtual Node* node() const OVERRIDE { return m_optionElement; }
     virtual void setSelected(bool) OVERRIDE;
     virtual bool canSetSelectedAttribute() const OVERRIDE;
-
-    virtual LayoutRect elementRect() const OVERRIDE;
-    virtual AXObject* parentObject() const OVERRIDE;
+    virtual String stringValue() const OVERRIDE;
+    virtual String title() const OVERRIDE { return String(); }
 
 private:
-    HTMLElement* m_optionElement;
-
     virtual bool isListBoxOption() const OVERRIDE { return true; }
     virtual bool canHaveChildren() const OVERRIDE { return false; }
     virtual bool computeAccessibilityIsIgnored() const OVERRIDE;
 
     HTMLSelectElement* listBoxOptionParentNode() const;
     int listBoxOptionIndex() const;
     AXObject* listBoxOptionAXObject(HTMLElement*) const;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXListBoxOption, isListBoxOption());
 
 } // namespace WebCore
 
 #endif // AXListBoxOption_h