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

Source/core/svg/SVGFESpecularLightingElement.cpp

Index: Source/core/svg/SVGFESpecularLightingElement.cpp
diff --git a/Source/core/svg/SVGFESpecularLightingElement.cpp b/Source/core/svg/SVGFESpecularLightingElement.cpp
index 422b6a4cb8ac3358d5ae2d39397eae45b3be57f5..2781bd5eadb9ed3106cbffee1ed62b66db40dc45 100644
--- a/Source/core/svg/SVGFESpecularLightingElement.cpp
+++ b/Source/core/svg/SVGFESpecularLightingElement.cpp
@@ -175,8 +175,8 @@ PassRefPtr<FilterEffect> SVGFESpecularLightingElement::build(SVGFilterBuilder* f
     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();
@@ -186,6 +186,7 @@ PassRefPtr<FilterEffect> SVGFESpecularLightingElement::build(SVGFilterBuilder* f
     ASSERT(renderer->style());
     Color color = renderer->style()->svgStyle()->lightingColor();
 
+    RefPtr<LightSource> lightSource = lightNode->lightSource(filter);
     RefPtr<FilterEffect> effect = FESpecularLighting::create(filter, color, m_surfaceScale->currentValue()->value(), m_specularConstant->currentValue()->value(),
         m_specularExponent->currentValue()->value(), kernelUnitLengthX()->currentValue()->value(), kernelUnitLengthY()->currentValue()->value(), lightSource.release());
     effect->inputEffects().append(input1);