Introduce isSVGFontElement() and isSVGImageElement(), and use them

Source/core/rendering/HitTestResult.cpp

Index: Source/core/rendering/HitTestResult.cpp
diff --git a/Source/core/rendering/HitTestResult.cpp b/Source/core/rendering/HitTestResult.cpp
index cd95be8312a5b4538ddc2a0baca4e636ba238ee1..f411fe86ce398d8a629ae2d995efccd0e331a55f 100644
--- a/Source/core/rendering/HitTestResult.cpp
+++ b/Source/core/rendering/HitTestResult.cpp
@@ -41,6 +41,7 @@
 #include "core/platform/Scrollbar.h"
 #include "core/rendering/HitTestLocation.h"
 #include "core/rendering/RenderImage.h"
+#include "core/svg/SVGImageElement.h"
 
 namespace WebCore {
 
@@ -289,7 +290,7 @@ KURL HitTestResult::absoluteImageURL() const
         || m_innerNonSharedNode->hasTagName(imgTag)
         || m_innerNonSharedNode->hasTagName(inputTag)
         || m_innerNonSharedNode->hasTagName(objectTag)    
-        || m_innerNonSharedNode->hasTagName(SVGNames::imageTag)
+        || isSVGImageElement(m_innerNonSharedNode.get())
        ) {
         Element* element = toElement(m_innerNonSharedNode.get());
         urlString = element->imageSourceURL();