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

Source/core/rendering/svg/SVGTextRunRenderingContext.cpp

Index: Source/core/rendering/svg/SVGTextRunRenderingContext.cpp
diff --git a/Source/core/rendering/svg/SVGTextRunRenderingContext.cpp b/Source/core/rendering/svg/SVGTextRunRenderingContext.cpp
index a78971585e0190da64e61eee673ab8fa189bd90c..fe7685b0d2e85ff96d410a2c13fc7fc1de8932b4 100644
--- a/Source/core/rendering/svg/SVGTextRunRenderingContext.cpp
+++ b/Source/core/rendering/svg/SVGTextRunRenderingContext.cpp
@@ -198,7 +198,7 @@ GlyphData SVGTextRunRenderingContext::glyphDataForCharacter(const Font& font, co
             RenderObject* parentRenderObject = renderObject->isText() ? renderObject->parent() : renderObject;
             ASSERT(parentRenderObject);
             if (Element* parentRenderObjectElement = toElement(parentRenderObject->node())) {
-                if (parentRenderObjectElement->hasTagName(SVGNames::altGlyphTag))
+                if (isSVGAltGlyphElement(*parentRenderObjectElement))
                     glyphData.fontData = primaryFont;
             }
         }