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

Source/core/html/HTMLMeterElement.h

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 43 matching lines @@
 
     double high() const;
     void setHigh(double);
 
     double optimum() const;
     void setOptimum(double);
 
     double valueRatio() const;
     GaugeRegion gaugeRegion() const;
 
-    virtual bool canContainRangeEndPoint() const override { return false; }
+    bool canContainRangeEndPoint() const override { return false; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit HTMLMeterElement(Document&);
-    virtual ~HTMLMeterElement();
+    ~HTMLMeterElement() override;
 
-    virtual bool areAuthorShadowsAllowed() const override { return false; }
-    virtual void willAddFirstOpenShadowRoot() override;
+    bool areAuthorShadowsAllowed() const override { return false; }
+    void willAddFirstOpenShadowRoot() override;
     LayoutMeter* layoutMeter() const;
 
-    virtual bool supportLabels() const override { return true; }
+    bool supportLabels() const override { return true; }
 
-    virtual LayoutObject* createLayoutObject(const ComputedStyle&) override;
-    virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
+    LayoutObject* createLayoutObject(const ComputedStyle&) override;
+    void parseAttribute(const QualifiedName&, const AtomicString&) override;
 
     void didElementStateChange();
-    virtual void didAddUserAgentShadowRoot(ShadowRoot&) override;
+    void didAddUserAgentShadowRoot(ShadowRoot&) override;
 
     RefPtrWillBeMember<MeterValueElement> m_value;
 };
 
 } // namespace blink
 
 #endif // HTMLMeterElement_h