Add missing argument to Element.setAttribute() calls

native_client_sdk/src/gonacl_appengine/static/frame.js

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var examples = [
   {name: 'bullet', text: 'Bullet Physics'},
   {name: 'earth', text: 'Raycasted Earth'},
   {name: 'lua', text: 'Lua Interpreter'},
   {name: 'life', text: 'Game of Life'},
   {name: 'voronoi', text: 'Voronoi Simulation'},
@@ skipping 120 matching lines @@
 }
 
 function createIframe(src) {
   var oldIframeEl = iframeEl;
 
   iframeEl = document.createElement('iframe');
   iframeEl.setAttribute('frameborder', '0');
   iframeEl.setAttribute('width', '100%');
   iframeEl.setAttribute('height', '100%');
   iframeEl.src = src;
-  iframeEl.setAttribute('hidden');
+  iframeEl.setAttribute('hidden', '');
   iframeEl.onload = function() {
     if (oldIframeEl)
       oldIframeEl.parentNode.removeChild(oldIframeEl);
     iframeEl.removeAttribute('hidden');
   }
   document.querySelector('section').appendChild(iframeEl);
 }
 
 function pushState(exampleName) {
   window.history.pushState(exampleName, '', '/demo/' + exampleName);
 }
 
 function replaceState(exampleName) {
   window.history.replaceState(exampleName, '', '/demo/' + exampleName);
 }
 
 function replaceHomeState() {
   window.history.replaceState('home', '', '/demo');
 }
 
 function showOldChromeErrorMessage() {
   document.getElementById('old-chrome').removeAttribute('hidden');
 }
 
 function showNotChromeErrorMessage() {
   document.getElementById('not-chrome').removeAttribute('hidden');
 }