Fix virtual/override/final usage in Source/platform/.

Source/platform/graphics/GeneratedImage.h

 /*
  * Copyright (C) 2008 Apple Computer, 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 16 matching lines @@
 #define GeneratedImage_h
 
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/Image.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT GeneratedImage : public Image {
 public:
-    virtual bool currentFrameHasSingleSecurityOrigin() const override { return true; }
+    bool currentFrameHasSingleSecurityOrigin() const override { return true; }
 
-    virtual void setContainerSize(const IntSize& size) override { m_size = size; }
-    virtual bool usesContainerSize() const override { return true; }
-    virtual bool hasRelativeWidth() const override { return true; }
-    virtual bool hasRelativeHeight() const override { return true; }
-    virtual void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) override;
+    void setContainerSize(const IntSize& size) override { m_size = size; }
+    bool usesContainerSize() const override { return true; }
+    bool hasRelativeWidth() const override { return true; }
+    bool hasRelativeHeight() const override { return true; }
+    void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) override;
 
-    virtual IntSize size() const override { return m_size; }
+    IntSize size() const override { return m_size; }
 
     // Assume that generated content has no decoded data we need to worry about
-    virtual void destroyDecodedData(bool) override { }
+    void destroyDecodedData(bool) override { }
 
 protected:
     void drawPattern(GraphicsContext*, const FloatRect&,
         const FloatSize&, const FloatPoint&, SkXfermode::Mode,
         const FloatRect&, const IntSize& repeatSpacing) final;
 
     // FIXME: Implement this to be less conservative.
-    virtual bool currentFrameKnownToBeOpaque() override { return false; }
+    bool currentFrameKnownToBeOpaque() override { return false; }
 
     GeneratedImage(const IntSize& size) : m_size(size) { }
 
     virtual void drawTile(GraphicsContext*, const FloatRect&) = 0;
 
     IntSize m_size;
 };
 
 } // namespace blink
 
 #endif