Add missing argument to Element.setAttribute() calls

chrome/browser/resources/sync_internals/about.js

 // Copyright (c) 2012 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.
 
 function highlightIfChanged(node, oldVal, newVal) {
   function clearHighlight() {
     this.removeAttribute('highlighted');
   }
 
   var oldStr = oldVal.toString();
   var newStr = newVal.toString();
   if (oldStr != '' && oldStr != newStr) {
     // Note the addListener function does not end up creating duplicate
     // listeners.  There can be only one listener per event at a time.
     // Reference: https://developer.mozilla.org/en/DOM/element.addEventListener
     node.addEventListener('webkitAnimationEnd', clearHighlight, false);
-    node.setAttribute('highlighted');
+    node.setAttribute('highlighted', '');
   }
 }
 
 (function() {
 // Contains the latest snapshot of sync about info.
 chrome.sync.aboutInfo = {};
 
 // TODO(akalin): Make aboutInfo have key names likeThis and not
 // like_this.
 function refreshAboutInfo(aboutInfo) {
@@ skipping 49 matching lines @@
     // Remove listeners to prevent sync events from overwriting imported data.
     chrome.sync.onServiceStateChanged.removeListeners();
 
     var aboutInfo = JSON.parse(data);
     refreshAboutInfo(aboutInfo);
   });
 }
 
 document.addEventListener('DOMContentLoaded', onLoad, false);
 })();