Remove PaintingData from LightSource

Source/platform/graphics/filters/LightSource.h

 /*
  * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
  * 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) 2010 Zoltan Herczeg <zherczeg@webkit.org>
  *
  * 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
@@ skipping 23 matching lines @@
 enum LightType {
     LS_DISTANT,
     LS_POINT,
     LS_SPOT
 };
 
 class TextStream;
 
 class PLATFORM_EXPORT LightSource : public RefCounted<LightSource> {
 public:
-
-    // Light vectors must be calculated for every pixel during
-    // painting. It is expensive to pass all these arguments to
-    // a frequently called function, especially because not all
-    // light sources require all of them. Instead, we just pass
-    // a reference to the following structure
-    struct PaintingData {
-        // SVGFELighting also use them
-        FloatPoint3D lightVector;
-        FloatPoint3D colorVector;
-        float lightVectorLength;
-        // Private members
-        FloatPoint3D directionVector;
-        FloatPoint3D privateColorVector;
-        float coneCutOffLimit;
-        float coneFullLight;
-    };
-
     LightSource(LightType type)
         : m_type(type)
     { }
 
     virtual ~LightSource();
 
     LightType type() const { return m_type; }
     virtual TextStream& externalRepresentation(TextStream&) const = 0;
 
     virtual PassRefPtr<LightSource> create(const FloatPoint3D& scale, const FloatSize& offset) const = 0;
 
-    virtual void initPaintingData(PaintingData&) const = 0;
-    // z is a float number, since it is the alpha value scaled by a user
-    // specified "surfaceScale" constant, which type is <number> in the SVG standard
-    virtual void updatePaintingData(PaintingData&, int x, int y, float z) const = 0;
-
     virtual bool setAzimuth(float) { return false; }
     virtual bool setElevation(float) { return false; }
     virtual bool setPosition(const FloatPoint3D&) { return false; }
     virtual bool setPointsAt(const FloatPoint3D&) { return false; }
     virtual bool setSpecularExponent(float) { return false; }
     virtual bool setLimitingConeAngle(float) { return false; }
 
 private:
     LightType m_type;
 };
 
 } // namespace blink
 
 #endif // LightSource_h