Add onfocuschange to the Extended Search API, with associated isFocused attribute.

chrome/browser/resources/local_ntp/local_ntp.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.
 
 
 /**
  * @fileoverview The local InstantExtended NTP and suggestions dropdown.
  */
 
 (function() {
@@ skipping 1654 matching lines @@
   ntpApiHandle.onthemechange = onThemeChange;
   ntpApiHandle.onmostvisitedchange = onMostVisitedChange;
 
   onThemeChange();
   onMostVisitedChange();
 
   searchboxApiHandle = topLevelHandle.searchBox;
   searchboxApiHandle.onnativesuggestions = updateSuggestions;
   searchboxApiHandle.onchange = updateSuggestions;
   searchboxApiHandle.onkeypress = handleKeyPress;
+  // TODO(donnd): consider adding an onfocuschange handler.

[samarth, 2013/05/13 20:56:53]

Not need to add a TODO here.  I don't see a good reason for adding it to the
local page, and if it comes up, we can just add it.

[Donn Denman, 2013/05/13 23:44:50]

Done.

   // TODO(jered): Re-enable this after http://crbug.com/236492 is fixed.
   // searchboxApiHandle.onmarginchange = setSuggestionStyles;
   if (window.innerWidth > 0) {
     setSuggestionStyles();
   } else {
     // Wait until the overlay is shown to initialize suggestion margins.
     window.addEventListener('resize', setSuggestionStyles);
   }
   searchboxApiHandle.onsubmit = function() {
     var value = searchboxApiHandle.value;
@@ skipping 20 matching lines @@
   }
 }
 
 document.addEventListener('DOMContentLoaded', init);
 window.addEventListener('message', handleMessage, false);
 window.addEventListener('blur', function() {
   if (activeBox)
     activeBox.clearHover();
 }, false);
 })();