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

Source/core/html/canvas/CanvasRenderingContext2D.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 63 matching lines @@
         ~Factory() override {};
 
         PassOwnPtrWillBeRawPtr<CanvasRenderingContext> create(HTMLCanvasElement* canvas, const CanvasContextCreationAttributes& attrs, Document& document) override
         {
             return adoptPtrWillBeNoop(new CanvasRenderingContext2D(canvas, attrs, document));
         }
         CanvasRenderingContext::ContextType contextType() const override { return CanvasRenderingContext::Context2d; }
         void onError(HTMLCanvasElement*, const String& error) override { };
     };
 
-    virtual ~CanvasRenderingContext2D();
+    ~CanvasRenderingContext2D() override;
 
     void strokeStyle(StringOrCanvasGradientOrCanvasPattern&) const;
     void setStrokeStyle(const StringOrCanvasGradientOrCanvasPattern&);
 
     void fillStyle(StringOrCanvasGradientOrCanvasPattern&) const;
     void setFillStyle(const StringOrCanvasGradientOrCanvasPattern&);
 
     float lineWidth() const;
     void setLineWidth(float);
 
@@ skipping 192 matching lines @@
     void validateStateStack();
 
     enum DrawType {
         ClipFill, // Fill that is already known to cover the current clip
         UntransformedUnclippedFill
     };
 
     void checkOverdraw(const SkRect&, const SkPaint*, CanvasRenderingContext2DState::ImageType, DrawType);
 
     CanvasRenderingContext::ContextType contextType() const override { return CanvasRenderingContext::Context2d; }
-    virtual bool is2d() const override { return true; }
-    virtual bool isAccelerated() const override;
-    virtual bool hasAlpha() const override { return m_hasAlpha; }
-    virtual void setIsHidden(bool) override;
-    void stop() override final;
+    bool is2d() const override { return true; }
+    bool isAccelerated() const override;
+    bool hasAlpha() const override { return m_hasAlpha; }
+    void setIsHidden(bool) override;
+    void stop() final;
     DECLARE_VIRTUAL_TRACE();
 
     virtual bool isTransformInvertible() const;
 
-    virtual WebLayer* platformLayer() const override;
+    WebLayer* platformLayer() const override;
 
     WillBeHeapVector<OwnPtrWillBeMember<CanvasRenderingContext2DState>> m_stateStack;
     OwnPtrWillBeMember<HitRegionManager> m_hitRegionManager;
     AntiAliasingMode m_clipAntialiasing;
     bool m_hasAlpha;
     LostContextMode m_contextLostMode;
     bool m_contextRestorable;
     MutableStylePropertyMap m_fetchedFonts;
     ListHashSet<String> m_fetchedFontsLRUList;
     unsigned m_tryRestoreContextAttemptCount;
     Timer<CanvasRenderingContext2D> m_dispatchContextLostEventTimer;
     Timer<CanvasRenderingContext2D> m_dispatchContextRestoredEventTimer;
     Timer<CanvasRenderingContext2D> m_tryRestoreContextEventTimer;
 };
 
 DEFINE_TYPE_CASTS(CanvasRenderingContext2D, CanvasRenderingContext, context, context->is2d(), context.is2d());
 
 } // namespace blink
 
 #endif // CanvasRenderingContext2D_h