Use initial values for flood/lighting-color/flood-opacity when detached

third_party/WebKit/Source/core/svg/SVGFEDiffuseLightingElement.cpp

Index: third_party/WebKit/Source/core/svg/SVGFEDiffuseLightingElement.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGFEDiffuseLightingElement.cpp b/third_party/WebKit/Source/core/svg/SVGFEDiffuseLightingElement.cpp
index 791b0c8ef4911905fa5eae52720cf55403469689..195adf34c9b063621ece835ca60fb8d3517224a5 100644
--- a/third_party/WebKit/Source/core/svg/SVGFEDiffuseLightingElement.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGFEDiffuseLightingElement.cpp
@@ -126,12 +126,11 @@ PassRefPtrWillBeRawPtr<FilterEffect> SVGFEDiffuseLightingElement::build(SVGFilte
     if (!input1)
         return nullptr;
 
-    LayoutObject* layoutObject = this->layoutObject();
-    if (!layoutObject)
-        return nullptr;
-
-    ASSERT(layoutObject->style());
-    Color color = layoutObject->style()->svgStyle().lightingColor();
+    Color color = Color::white;
+    if (LayoutObject* layoutObject = this->layoutObject()) {
+        ASSERT(layoutObject->style());
+        color = layoutObject->styleRef().svgStyle().lightingColor();
+    }
 
     const SVGFELightElement* lightNode = SVGFELightElement::findLightElement(*this);
     RefPtr<LightSource> lightSource = lightNode ? lightNode->lightSource(filter) : nullptr;