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

Source/core/html/HTMLOptionElement.h

Index: Source/core/html/HTMLOptionElement.h
diff --git a/Source/core/html/HTMLOptionElement.h b/Source/core/html/HTMLOptionElement.h
index da95f6a9a7f59a0627fdd1e73a16a5d8f79afe16..81673fb683961ea596e5e3b4d910dbac9f04ad54 100644
--- a/Source/core/html/HTMLOptionElement.h
+++ b/Source/core/html/HTMLOptionElement.h
@@ -61,7 +61,7 @@ public:
 
     bool ownElementDisabled() const { return m_disabled; }
 
-    virtual bool isDisabledFormControl() const override;
+    bool isDisabledFormControl() const override;
 
     String textIndentedToRespectGroupLabel() const;
 
@@ -78,21 +78,21 @@ private:
     explicit HTMLOptionElement(Document&);
     ~HTMLOptionElement();
 
-    virtual bool supportsFocus() const override;
-    virtual void attach(const AttachContext& = AttachContext()) override;
-    virtual void detach(const AttachContext& = AttachContext()) override;
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
-    virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
-    virtual void didNotifySubtreeInsertionsToDocument() override;
-    virtual void removedFrom(ContainerNode*) override;
-    virtual void accessKeyAction(bool) override;
-    virtual void childrenChanged(const ChildrenChange&) override;
+    bool supportsFocus() const override;
+    void attach(const AttachContext& = AttachContext()) override;
+    void detach(const AttachContext& = AttachContext()) override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    InsertionNotificationRequest insertedInto(ContainerNode*) override;
+    void didNotifySubtreeInsertionsToDocument() override;
+    void removedFrom(ContainerNode*) override;
+    void accessKeyAction(bool) override;
+    void childrenChanged(const ChildrenChange&) override;
 
     // <option> never has a layoutObject so we manually manage a cached style.
     void updateNonComputedStyle();
-    virtual ComputedStyle* nonLayoutObjectComputedStyle() const override;
-    virtual PassRefPtr<ComputedStyle> customStyleForLayoutObject() override;
-    virtual void didAddUserAgentShadowRoot(ShadowRoot&) override;
+    ComputedStyle* nonLayoutObjectComputedStyle() const override;
+    PassRefPtr<ComputedStyle> customStyleForLayoutObject() override;
+    void didAddUserAgentShadowRoot(ShadowRoot&) override;
 
     String collectOptionInnerText() const;