Let svg event attributes be reflected the same as html event attributes.

Source/core/html/HTMLElement.h

Index: Source/core/html/HTMLElement.h
diff --git a/Source/core/html/HTMLElement.h b/Source/core/html/HTMLElement.h
index 9631f8093dd7c5b891bf5ff0921f46e3ee18aaf3..454577f1dd87c54504976c3fc80efc4fcfd86d89 100644
--- a/Source/core/html/HTMLElement.h
+++ b/Source/core/html/HTMLElement.h
@@ -91,6 +91,8 @@ public:
     virtual bool isInteractiveContent() const;
     virtual void defaultEventHandler(Event*) OVERRIDE;
 
+    static const AtomicString& eventNameForAttributeName(const QualifiedName& attrName);
+
 protected:
     HTMLElement(const QualifiedName& tagName, Document&, ConstructionType);
 
@@ -122,8 +124,6 @@ private:
 
     TranslateAttributeMode translateAttributeMode() const;
 
-    const AtomicString& eventNameForAttributeName(const QualifiedName& attrName) const;
-
     void handleKeypressEvent(KeyboardEvent*);
     bool supportsSpatialNavigationFocus() const;
 };