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

Source/core/svg/SVGFEDiffuseLightingElement.cpp

 /*
  * Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 150 matching lines @@
     primitiveAttributeChanged(attrName);
 }
 
 PassRefPtr<FilterEffect> SVGFEDiffuseLightingElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
 {
     FilterEffect* input1 = filterBuilder->getEffectById(AtomicString(m_in1->currentValue()->value()));
 
     if (!input1)
         return nullptr;
 
-    RefPtr<LightSource> lightSource = SVGFELightElement::findLightSource(*this);
-    if (!lightSource)
+    SVGFELightElement* lightNode = SVGFELightElement::findLightElement(*this);
+    if (!lightNode)
         return nullptr;
 
     RenderObject* renderer = this->renderer();
     if (!renderer)
         return nullptr;
 
     ASSERT(renderer->style());
     Color color = renderer->style()->svgStyle()->lightingColor();
 
+    RefPtr<LightSource> lightSource = lightNode->lightSource(filter);
     RefPtr<FilterEffect> effect = FEDiffuseLighting::create(filter, color, m_surfaceScale->currentValue()->value(), m_diffuseConstant->currentValue()->value(),
         kernelUnitLengthX()->currentValue()->value(), kernelUnitLengthY()->currentValue()->value(), lightSource.release());
     effect->inputEffects().append(input1);
     return effect.release();
 }
 
 }