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

Source/core/rendering/RenderLayerFilterInfo.cpp

Index: Source/core/rendering/RenderLayerFilterInfo.cpp
diff --git a/Source/core/rendering/RenderLayerFilterInfo.cpp b/Source/core/rendering/RenderLayerFilterInfo.cpp
index bfb25ee6988c74059a36d60312eca5e852590aae..473e9eb6ce2d18c66af1e9617572ba4cdd7a0d1b 100644
--- a/Source/core/rendering/RenderLayerFilterInfo.cpp
+++ b/Source/core/rendering/RenderLayerFilterInfo.cpp
@@ -127,7 +127,7 @@ void RenderLayerFilterInfo::updateReferenceFilterClients(const FilterOperations&
             // Reference is internal; add layer as a client so we can trigger
             // filter repaint on SVG attribute change.
             Element* filter = m_layer->renderer()->node()->document().getElementById(referenceFilterOperation->fragment());
-            if (!filter || !filter->hasTagName(SVGNames::filterTag))
+            if (!isSVGFilterElement(filter))
                 continue;
             if (filter->renderer())
                 toRenderSVGResourceContainer(filter->renderer())->addClientRenderLayer(m_layer);