Fix virtual/override/final usage in Source/core/html/.

Source/core/html/HTMLLIElement.h

Index: Source/core/html/HTMLLIElement.h
diff --git a/Source/core/html/HTMLLIElement.h b/Source/core/html/HTMLLIElement.h
index d5706675d3e94e1fdafb64aea5db71450e763727..edd39db263a6ce8b245b1d37ae538f725fcf36e2 100644
--- a/Source/core/html/HTMLLIElement.h
+++ b/Source/core/html/HTMLLIElement.h
@@ -35,11 +35,11 @@ public:
 private:
     explicit HTMLLIElement(Document&);
 
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual bool isPresentationAttribute(const QualifiedName&) const override;
-    virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    bool isPresentationAttribute(const QualifiedName&) const override;
+    void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override;
 
-    virtual void attach(const AttachContext& = AttachContext()) override;
+    void attach(const AttachContext& = AttachContext()) override;
 
     void parseValue(const AtomicString&);
 };