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

chrome/browser/resources/chromeos/proxy_settings.js

Index: chrome/browser/resources/chromeos/proxy_settings.js
diff --git a/chrome/browser/resources/chromeos/proxy_settings.js b/chrome/browser/resources/chromeos/proxy_settings.js
index 3ea31ec5d1382bf0a56d05f7f34f2d8e1ee37483..aca24dd7420eafc29ddd02641e650c21fbf03842 100644
--- a/chrome/browser/resources/chromeos/proxy_settings.js
+++ b/chrome/browser/resources/chromeos/proxy_settings.js
@@ -25,6 +25,14 @@ function load() {
   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');