Wire up invalidation for flood-{color,opacity} on <feDropShadow>

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilterPrimitive.cpp

Index: third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilterPrimitive.cpp
diff --git a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilterPrimitive.cpp b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilterPrimitive.cpp
index 851cf0d53b88a8b2c6c4d600d716e395b198804c..c2aa8c59428d6d9016b7d0716ac53ba5fd489523 100644
--- a/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilterPrimitive.cpp
+++ b/third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceFilterPrimitive.cpp
@@ -36,14 +36,12 @@ void LayoutSVGResourceFilterPrimitive::styleDidChange(StyleDifference diff, cons
     LayoutObject* filter = parent();
     if (!filter)
         return;
-    ASSERT(filter->isSVGResourceFilter());
-
+    DCHECK(filter->isSVGResourceFilter());
     if (!oldStyle)
         return;
-
-    const SVGComputedStyle& newStyle = this->style()->svgStyle();
-    ASSERT(element());
-    if (isSVGFEFloodElement(*element())) {
+    const SVGComputedStyle& newStyle = this->styleRef().svgStyle();
+    DCHECK(element());
+    if (isSVGFEFloodElement(*element()) || isSVGFEDropShadowElement(*element())) {
         if (newStyle.floodColor() != oldStyle->svgStyle().floodColor())
             toLayoutSVGResourceFilter(filter)->primitiveAttributeChanged(this, SVGNames::flood_colorAttr);
         if (newStyle.floodOpacity() != oldStyle->svgStyle().floodOpacity())