Added Skia turbulence filter to Webkit.

Source/core/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 98 matching lines @@
         PaintingData* paintingData;
         int startY;
         int endY;
     };
 
     static void fillRegionWorker(FillRegionParameters*);
 
     FETurbulence(Filter*, TurbulenceType, float, float, int, float, bool);
 
     virtual void applySoftware() OVERRIDE;
+    virtual bool platformApplySkia();

[Stephen White, 2013/06/13 17:28:06]

The base class version of this function was renamed to applySkia(), so this
probably isn't getting called. It should also be marked OVERRIDE, which would
catch this error.

[sugoi, 2013/06/13 17:46:33]

Done.

+    virtual SkImageFilter* createImageFilter(SkiaImageFilterBuilder*);
+    SkShader* createShader(const IntRect& filterRegion) const;
 
     inline void initPaint(PaintingData&);
     float noise2D(int channel, PaintingData&, StitchData&, const FloatPoint&);
     unsigned char calculateTurbulenceValueForPoint(int channel, PaintingData&, StitchData&, const FloatPoint&);
     inline void fillRegion(Uint8ClampedArray*, PaintingData&, int, int);
 
     TurbulenceType m_type;
     float m_baseFrequencyX;
     float m_baseFrequencyY;
     int m_numOctaves;
     float m_seed;
     bool m_stitchTiles;
 };
 
 } // namespace WebCore
 
 #endif // FETurbulence_h