Remove unused method and de-virtualize others in Element.h

Source/core/dom/Element.h

Index: Source/core/dom/Element.h
diff --git a/Source/core/dom/Element.h b/Source/core/dom/Element.h
index 284850b68397ca0a2d4cd998b14457c1597ffc6f..46b7418100b0d8de92383136c52d62da643c3ca5 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -417,7 +417,6 @@ public:
     ShadowRoot* shadowRoot() const;
 
     bool hasAuthorShadowRoot() const { return shadowRoot(); }
-    virtual void willAddAuthorShadowRoot() { }
 
     ShadowRoot* userAgentShadowRoot() const;
     ShadowRoot* ensureUserAgentShadowRoot();
@@ -569,9 +568,9 @@ public:
     };
     
     void webkitRequestFullScreen(unsigned short flags);
-    virtual bool containsFullScreenElement() const;
-    virtual void setContainsFullScreenElement(bool);
-    virtual void setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(bool);
+    bool containsFullScreenElement() const;
+    void setContainsFullScreenElement(bool);
+    void setContainsFullScreenElementOnAncestorsCrossingFrameBoundaries(bool);
 
     // W3C API
     void webkitRequestFullscreen();
@@ -581,7 +580,7 @@ public:
 
     void webkitRequestPointerLock();
 
-    virtual bool isSpellCheckingEnabled() const;
+    bool isSpellCheckingEnabled() const;
 
     PassRefPtr<RenderStyle> styleForRenderer();