Add missing argument to Element.setAttribute() calls

chrome/browser/resources/file_manager/foreground/js/ui/search_box.js

 // Copyright 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.
 
 'use strict';
 
 /**
  * Search box.
  *
  * @param {element} element Root element of the search box.
@@ skipping 99 matching lines @@
   var li = new cr.ui.ListItem();
   li.itemInfo = item;
 
   var icon = document.createElement('div');
   icon.className = 'detail-icon';
 
   var text = document.createElement('div');
   text.className = 'detail-text';
 
   if (item.isHeaderItem) {
-    icon.setAttribute('search-icon');
+    icon.setAttribute('search-icon', '');
     text.innerHTML =
         strf('SEARCH_DRIVE_HTML', util.htmlEscape(item.searchQuery));
   } else {
     var iconType = FileType.getIcon(item.entry);
     icon.setAttribute('file-type-icon', iconType);
     // highlightedBaseName is a piece of HTML with meta characters properly
     // escaped. See the comment at fileBrowserPrivate.searchDriveMetadata().
     text.innerHTML = item.highlightedBaseName;
   }
   li.appendChild(icon);
@@ skipping 62 matching lines @@
  * Updates styles of the search box.
  * @private
  */
 SearchBox.prototype.updateStyles_ = function() {
   this.element.classList.toggle('has-text',
                                  !!this.inputElement.value);
   var width = this.textMeasure_.getWidth(this.inputElement.value) +
       16 /* Extra space to allow leeway. */;
   this.inputElement.style.width = width + 'px';
 };