Use isSVG*Element() helpers more in SVG code (Part 3)

Source/core/rendering/svg/RenderSVGResourceFilterPrimitive.cpp

Index: Source/core/rendering/svg/RenderSVGResourceFilterPrimitive.cpp
diff --git a/Source/core/rendering/svg/RenderSVGResourceFilterPrimitive.cpp b/Source/core/rendering/svg/RenderSVGResourceFilterPrimitive.cpp
index e34449d35eaaedcb4080832d671d31327d580323..f7073cad183dd354a8077c338373e2c6d7f99e10 100644
--- a/Source/core/rendering/svg/RenderSVGResourceFilterPrimitive.cpp
+++ b/Source/core/rendering/svg/RenderSVGResourceFilterPrimitive.cpp
@@ -44,12 +44,13 @@ void RenderSVGResourceFilterPrimitive::styleDidChange(StyleDifference diff, cons
         return;
 
     const SVGRenderStyle* newStyle = this->style()->svgStyle();
-    if (element()->hasTagName(SVGNames::feFloodTag)) {
+    ASSERT(element());
+    if (isSVGFEFloodElement(*element())) {
         if (newStyle->floodColor() != oldStyle->svgStyle()->floodColor())
             toRenderSVGResourceFilter(filter)->primitiveAttributeChanged(this, SVGNames::flood_colorAttr);
         if (newStyle->floodOpacity() != oldStyle->svgStyle()->floodOpacity())
             toRenderSVGResourceFilter(filter)->primitiveAttributeChanged(this, SVGNames::flood_opacityAttr);
-    } else if (element()->hasTagName(SVGNames::feDiffuseLightingTag) || element()->hasTagName(SVGNames::feSpecularLightingTag)) {
+    } else if (isSVGFEDiffuseLightingElement(*element()) || isSVGFESpecularLightingElement(*element())) {
         if (newStyle->lightingColor() != oldStyle->svgStyle()->lightingColor())
             toRenderSVGResourceFilter(filter)->primitiveAttributeChanged(this, SVGNames::lighting_colorAttr);
     }