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

Source/core/html/shadow/SpinButtonElement.h

Index: Source/core/html/shadow/SpinButtonElement.h
diff --git a/Source/core/html/shadow/SpinButtonElement.h b/Source/core/html/shadow/SpinButtonElement.h
index 14e237610134913ffa01b1b194e224d126b0c315..155d391538fd080b9e76ad1960691b2966342bef 100644
--- a/Source/core/html/shadow/SpinButtonElement.h
+++ b/Source/core/html/shadow/SpinButtonElement.h
@@ -66,8 +66,8 @@ public:
 
     void step(int amount);
 
-    virtual bool willRespondToMouseMoveEvents() override;
-    virtual bool willRespondToMouseClickEvents() override;
+    bool willRespondToMouseMoveEvents() override;
+    bool willRespondToMouseClickEvents() override;
 
     void forwardEvent(Event*);
 
@@ -76,20 +76,20 @@ public:
 private:
     SpinButtonElement(Document&, SpinButtonOwner&);
 
-    virtual void detach(const AttachContext&) override;
-    virtual bool isSpinButtonElement() const override { return true; }
-    virtual bool isDisabledFormControl() const override { return shadowHost() && shadowHost()->isDisabledFormControl(); }
-    virtual bool matchesReadOnlyPseudoClass() const override;
-    virtual bool matchesReadWritePseudoClass() const override;
-    virtual void defaultEventHandler(Event*) override;
-    virtual void willOpenPopup() override;
+    void detach(const AttachContext&) override;
+    bool isSpinButtonElement() const override { return true; }
+    bool isDisabledFormControl() const override { return shadowHost() && shadowHost()->isDisabledFormControl(); }
+    bool matchesReadOnlyPseudoClass() const override;
+    bool matchesReadWritePseudoClass() const override;
+    void defaultEventHandler(Event*) override;
+    void willOpenPopup() override;
     void doStepAction(int);
     void startRepeatingTimer();
     void stopRepeatingTimer();
     void repeatingTimerFired(Timer<SpinButtonElement>*);
-    virtual void setHovered(bool = true) override;
+    void setHovered(bool = true) override;
     bool shouldRespondToMouseEvents();
-    virtual bool isMouseFocusable() const override { return false; }
+    bool isMouseFocusable() const override { return false; }
 
     RawPtrWillBeMember<SpinButtonOwner> m_spinButtonOwner;
     bool m_capturing;