Optimize hasTagName when called on an HTMLElement / SVGElement

Source/core/svg/SVGElement.h

Index: Source/core/svg/SVGElement.h
diff --git a/Source/core/svg/SVGElement.h b/Source/core/svg/SVGElement.h
index 15380169fc72810aed98c77177c501102b9ddc73..fd95c19b67d17ea85eb5caae5ad6d3e06b47519e 100644
--- a/Source/core/svg/SVGElement.h
+++ b/Source/core/svg/SVGElement.h
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
- * Copyright (C) 2009 Apple Inc. All rights reserved.
+ * Copyright (C) 2009, 2014 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -22,7 +22,7 @@
 #ifndef SVGElement_h
 #define SVGElement_h
 
-#include "core/SVGElementTypeHelpers.h"
+#include "core/SVGNames.h"
 #include "core/dom/Element.h"
 #include "core/svg/SVGAnimatedString.h"
 #include "core/svg/SVGParsingError.h"
@@ -44,6 +44,7 @@ class SVGElement;
 class SVGElementRareData;
 class SVGFitToViewBox;
 class SVGSVGElement;
+class SVGUseElement;
 
 void mapAttributeToCSSProperty(HashMap<StringImpl*, CSSPropertyID>* propertyNameToIdMap, const QualifiedName& attrName);
 
@@ -60,6 +61,8 @@ public:
 
     bool isOutermostSVGSVGElement() const;
 
+    bool hasTagName(const SVGQualifiedName& name) const { return hasLocalName(name.localName()); }
+
     virtual String title() const OVERRIDE;
     bool hasRelativeLengths() const { return !m_elementsWithRelativeLengths.isEmpty(); }
     static bool isAnimatableCSSProperty(const QualifiedName&);
@@ -260,8 +263,16 @@ struct SVGAttributeHashTranslator {
 
 DEFINE_ELEMENT_TYPE_CASTS(SVGElement, isSVGElement());
 
-template <> inline bool isElementOfType<const SVGElement>(const Node& node) { return node.isSVGElement(); }
+template <typename T> bool isElementOfType(const SVGElement&);
+template <> inline bool isElementOfType<const SVGElement>(const SVGElement&) { return true; }
+
+inline bool Node::hasTagName(const SVGQualifiedName& name) const
+{
+    return isSVGElement() && toSVGElement(*this).hasTagName(name);
+}
 
 }
 
+#include "core/SVGElementTypeHelpers.h"
+
 #endif