Drop virtual LightSource::create

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 32 matching lines @@
 public:
     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 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