Added fix that Gaia should be reloaded when proxy settings were changed.

chrome/browser/resources/chromeos/login/screen_error_message.js

Index: chrome/browser/resources/chromeos/login/screen_error_message.js
diff --git a/chrome/browser/resources/chromeos/login/screen_error_message.js b/chrome/browser/resources/chromeos/login/screen_error_message.js
index 144374a613f6becf4a127631a523cdafd431e2c5..61dd100a16f6f7a4fc02b55179494fa25a85ad40 100644
--- a/chrome/browser/resources/chromeos/login/screen_error_message.js
+++ b/chrome/browser/resources/chromeos/login/screen_error_message.js
@@ -161,11 +161,13 @@ cr.define('login', function() {
       var isTimeout = false;
       var isShown = !offlineMessage.classList.contains('hidden') &&
           !offlineMessage.classList.contains('faded');
+      var currentScreenReloaded = false;
 
       if (reason == ERROR_REASONS.PROXY_CONFIG_CHANGED && shouldOverlay &&
-          isShown) {
+          !currentScreenReloaded) {
         // Schedules a immediate retry.
         currentScreen.doReload();
+        currentScreenReloaded = true;
         console.log('Retry page load since proxy settings has been changed');
       }
 
@@ -278,8 +280,10 @@ cr.define('login', function() {
             Oobe.getInstance().updateInnerContainerSize_(currentScreen);
 
           // Forces a reload for Gaia screen on hiding error message.
-          if (currentScreen.id == 'gaia-signin')
+          if (currentScreen.id == 'gaia-signin' && !currentScreenReloaded) {
             currentScreen.doReload();
+            currentScreenReloaded = true;
+          }
         }
       }
     },