[cros] OOBE/Login: proxy settings are saved when closed immediately after typing.

chrome/browser/resources/chromeos/proxy_settings.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.
 
 var OptionsPage = options.OptionsPage;
 var Preferences = options.Preferences;
 var ProxyOptions = options.ProxyOptions;
 
 /**
  * DOMContentLoaded handler, sets up the page.
  */
 function load() {
   localStrings = new LocalStrings();
 
   if (cr.isChromeOS)
     document.documentElement.setAttribute('os', 'chromeos');
 
   // Decorate the existing elements in the document.
   cr.ui.decorate('input[pref][type=checkbox]', options.PrefCheckbox);
   cr.ui.decorate('input[pref][type=number]', options.PrefNumber);
   cr.ui.decorate('input[pref][type=radio]', options.PrefRadio);
   cr.ui.decorate('input[pref][type=range]', options.PrefRange);
   cr.ui.decorate('select[pref]', options.PrefSelect);
   cr.ui.decorate('input[pref][type=text]', options.PrefTextField);
   cr.ui.decorate('input[pref][type=url]', options.PrefTextField);
   ProxyOptions.getInstance().initializePage();
 
+  // TODO(ivankr): remove when http://crosbug.com/20660 is resolved.
+  var inputs = document.querySelectorAll('input[pref]');
+  for (var i = 0, el; el = inputs[i]; i++) {
+    el.addEventListener('keyup', function(e) {
+      cr.dispatchSimpleEvent(this, 'change');
+    });
+  }
+
   Preferences.getInstance().initialize();
   chrome.send('coreOptionsInitialize');
 
   ProxyOptions.getInstance().visible = true;
 }
 
 document.addEventListener('DOMContentLoaded', load);