Fix a race condition in the file app

www/file/main.js

@@ -17,7 +17,8 @@ define([
     var APP = {};
 
     $(function () {
-// TODO race condition with contents() here
+
+    var andThen = function () {
         var ifrw = $('#pad-iframe')[0].contentWindow;
         var $iframe = $('#pad-iframe').contents();
         var $form = $iframe.find('#upload-form');
@@ -38,7 +39,6 @@ define([
 
         var uploadMode = false;
 
-    var andThen = function () {
         var $bar = $iframe.find('.toolbar-container');
 
         var secret;