backout due to orange

content/base/src/nsGenericElement.cpp

@@ -3426,13 +3426,6 @@ nsGenericElement::AddScriptEventListener(nsIAtom* aEventName,
                                          const nsAString& aValue,
                                          PRBool aDefer)
 {
-  nsIDocument *ownerDoc = GetOwnerDoc();
-  if (!ownerDoc || ownerDoc->IsLoadedAsData()) {
-    // Make this a no-op rather than throwing an error to avoid
-    // the error causing problems setting the attribute.
-    return NS_OK;
-  }
-
   NS_PRECONDITION(aEventName, "Must have event name!");
   nsCOMPtr<nsISupports> target;
   PRBool defer = PR_TRUE;
@@ -3444,6 +3437,8 @@ nsGenericElement::AddScriptEventListener(nsIAtom* aEventName,
   NS_ENSURE_SUCCESS(rv, rv);
 
   if (manager) {
+    nsIDocument *ownerDoc = GetOwnerDoc();
+
     defer = defer && aDefer; // only defer if everyone agrees...
 
     PRUint32 lang = GetScriptTypeID();