Fix bug 316025 -- no need to create a wrapper on plugin teardown if we don't

have one already.  r+sr=jst


git-svn-id: svn://10.0.0.236/trunk@184477 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/modules/plugin/base/src/nsJSNPRuntime.cpp

@@ -1409,10 +1409,11 @@ nsJSNPRuntime::OnPluginDestroy(NPP npp)
     return;
   }
 
-  nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
-  xpc->WrapNative(cx, ::JS_GetGlobalObject(cx), element,
-                  NS_GET_IID(nsIDOMElement),
-                  getter_AddRefs(holder));
+  nsCOMPtr<nsISupports> supp(do_QueryInterface(element));
+  nsCOMPtr<nsIXPConnectWrappedNative> holder;
+  xpc->GetWrappedNativeOfNativeObject(cx, ::JS_GetGlobalObject(cx), supp,
+                                      NS_GET_IID(nsISupports),
+                                      getter_AddRefs(holder));
   if (!holder) {
     return;
   }