Map light-source oBB-relative coordinates to the user-space of the filter

Source/platform/graphics/filters/Filter.h

 /*
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 52 matching lines @@
     FloatRect mapAbsoluteRectToLocalRect(const FloatRect& rect) const { return m_inverseTransform.mapRect(rect); }
 
     virtual float applyHorizontalScale(float value) const
     {
         return value * m_absoluteTransform.a();
     }
     virtual float applyVerticalScale(float value) const
     {
         return value * m_absoluteTransform.d();
     }
+    virtual FloatPoint3D resolve3dPoint(const FloatPoint3D& point) const { return point; }
 
     virtual IntRect sourceImageRect() const = 0;
 
     FloatRect absoluteFilterRegion() const { return m_absoluteFilterRegion; }
 
     FloatRect filterRegion() const { return m_filterRegion; }
     void setFilterRegion(const FloatRect& rect)
     {
         m_filterRegion = rect;
         m_absoluteFilterRegion = m_absoluteTransform.mapRect(m_filterRegion);
@@ skipping 27 matching lines @@
     AffineTransform m_absoluteTransform;
     AffineTransform m_inverseTransform;
     FloatRect m_absoluteFilterRegion;
     FloatRect m_filterRegion;
     RefPtr<SkImageFilter::Cache> m_cache;
 };
 
 } // namespace WebCore
 
 #endif // Filter_h