Implement select element list box with shadow DOM.

Source/WebCore/html/HTMLOptionElement.h

Index: Source/WebCore/html/HTMLOptionElement.h
diff --git a/Source/WebCore/html/HTMLOptionElement.h b/Source/WebCore/html/HTMLOptionElement.h
index 673f077f322acf67af739a5b662d708ad854c930..32eab2aa7d26b1221f0a916fc6313328f6e80329 100644
--- a/Source/WebCore/html/HTMLOptionElement.h
+++ b/Source/WebCore/html/HTMLOptionElement.h
@@ -61,6 +61,7 @@ public:
     bool ownElementDisabled() const { return m_disabled; }
 
     virtual bool isDisabledFormControl() const OVERRIDE;
+    virtual PassRefPtr<RenderStyle> customStyleForRenderer() OVERRIDE;
 
     String textIndentedToRespectGroupLabel() const;
 
@@ -71,9 +72,6 @@ private:
 
     virtual bool supportsFocus() const;
     virtual bool isFocusable() const;
-    virtual bool rendererIsNeeded(const NodeRenderingContext&) { return false; }
-    virtual void attach();
-    virtual void detach();
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
 
@@ -82,18 +80,11 @@ private:
 
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);
 
-    // <option> never has a renderer so we manually manage a cached style.
-    void updateNonRenderStyle();
-    virtual RenderStyle* nonRendererStyle() const OVERRIDE;
-    virtual PassRefPtr<RenderStyle> customStyleForRenderer() OVERRIDE;
-
-    void didRecalcStyle(StyleChange) OVERRIDE;
-
     String collectOptionInnerText() const;
+    void updateLabel();
 
     bool m_disabled;
     bool m_isSelected;
-    RefPtr<RenderStyle> m_style;
 };
 
 HTMLOptionElement* toHTMLOptionElement(Node*);