Update more platform classes to use OVERRIDE / FINAL when needed

Source/platform/graphics/filters/FETurbulence.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Renata Hodovan <reni@inf.u-szeged.hu>
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 42 matching lines @@
     bool setSeed(float);
 
     int numOctaves() const;
     bool setNumOctaves(int);
 
     bool stitchTiles() const;
     bool setStitchTiles(bool);
 
     static void fillRegionWorker(void*);
 
-    virtual TextStream& externalRepresentation(TextStream&, int indention) const;
+    virtual TextStream& externalRepresentation(TextStream&, int indention) const OVERRIDE;
 
 private:
     static const int s_blockSize = 256;
     static const int s_blockMask = s_blockSize - 1;
 
     static const int s_minimalRectDimension = (100 * 100); // Empirical data limit for parallel jobs.
 
     struct PaintingData {
         PaintingData(long paintingSeed, const IntSize& paintingSize)
             : seed(paintingSeed)
@@ skipping 55 matching lines @@
     float m_baseFrequencyX;
     float m_baseFrequencyY;
     int m_numOctaves;
     float m_seed;
     bool m_stitchTiles;
 };
 
 } // namespace WebCore
 
 #endif // FETurbulence_h