A11y: Give the downloads search box a label.

chrome/browser/resources/downloads.js

 // Copyright (c) 2011 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.
 
 ///////////////////////////////////////////////////////////////////////////////
 // Helper functions
 function $(o) {return document.getElementById(o);}
 
 /**
  * Sets the display style of a node.
@@ skipping 518 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // Page:
 var downloads, localStrings, resultsTimeout;
 
 function load() {
   localStrings = new LocalStrings();
   downloads = new Downloads();
   $('term').focus();
+  $('term').setAttribute('aria-labelledby', 'search-submit');
   setSearch('');
 }
 
 function setSearch(searchText) {
   downloads.clear();
   downloads.setSearchText(searchText);
   chrome.send('getDownloads', [searchText.toString()]);
 }
 
 function clearAll() {
@@ skipping 43 matching lines @@
 $('clear-all').onclick = function () { clearAll(''); };
 $('search-link').onclick = function () {
   setSearch('');
   return false;
 };
 $('search-form').onsubmit = function () {
   setSearch(this.term.value);
   return false;
 };