Remove form control related virtual methods from Element

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 ff899822534bda2e6f24c4e82643280cf7dd64f6..e563b48206418cce596aa72f8cd8e2756bfa4efc 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -469,13 +469,6 @@ public:
 
     virtual bool canContainRangeEndPoint() const OVERRIDE { return true; }
 
-    virtual const AtomicString& formControlType() const { return nullAtom; }
-
-    // FIXME: Only HTMLInputElement uses these, they don't need to be virtual.
-    virtual bool wasChangedSinceLastFormControlChangeEvent() const { return false; }
-    virtual void setChangedSinceLastFormControlChangeEvent(bool) { }
-    virtual void dispatchFormControlChangeEvent() { }
-
     // Used for disabled form elements; if true, prevents mouse events from being dispatched
     // to event listeners, and prevents DOMActivate events from being sent at all.
     virtual bool isDisabledFormControl() const { return false; }