1 files changed, 6 insertions, 5 deletions
diff --git a/dom/base/Element.h b/dom/base/Element.h
index 8139236aa..aa917bffc 100644
--- a/dom/base/Element.h
+++ b/dom/base/Element.h
@@ -1336,16 +1336,17 @@ protected:
    * @param aName the localname of the attribute being set
    * @param aValue the value it's being set to represented as either a string or
    *        a parsed nsAttrValue. Alternatively, if the attr is being removed it
-   *        will be null. BeforeSetAttr is allowed to modify aValue by parsing
-   *        the string to an nsAttrValue (to avoid having to reparse it in
-   *        ParseAttribute).
+   *        will be null.
    * @param aNotify Whether we plan to notify document observers.
    */
   // Note that this is inlined so that when subclasses call it it gets
   // inlined.  Those calls don't go through a vtable.
   virtual nsresult BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName,
-                                 nsAttrValueOrString* aValue,
-                                 bool aNotify);
+                                 const nsAttrValueOrString* aValue,
+                                 bool aNotify)
+  {
+    return NS_OK;
+  }
 
   /**
    * Hook that is called by Element::SetAttr to allow subclasses to