Refactored error screen logic.

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

Index: chrome/browser/resources/chromeos/login/screen_error_message.css
diff --git a/chrome/browser/resources/chromeos/login/screen_error_message.css b/chrome/browser/resources/chromeos/login/screen_error_message.css
index 82473384d4ea914c562d9c2bf4bebf3b6bbc4815..ce098bd4a628565036657ea45c4b176f9b0928cf 100644
--- a/chrome/browser/resources/chromeos/login/screen_error_message.css
+++ b/chrome/browser/resources/chromeos/login/screen_error_message.css
@@ -32,23 +32,25 @@ html[oobe=new] #error-message {
   margin-top: 20px;
 }
 
-.show-with-offline-message,
-.show-with-captive-portal,
 .show-with-proxy-error,
+.show-with-captive-portal-error,
+.show-with-timeout-error,
+.show-with-offline-error,
 .guest-signin,
 .offline-login {
   display: none;
 }
 
-.show-offline-message .show-with-offline-message,
-.show-captive-portal .show-with-captive-portal,
+.show-captive-portal-error .show-with-captive-portal-error,
 .show-proxy-error .show-with-proxy-error,
+.show-timeout-error .show-with-timeout-error,
+.show-offline-error .show-with-offline-error,
 .allow-guest-signin .guest-signin,
 .allow-offline-login .offline-login {
   display: block;
 }
 
-.show-captive-portal .dont-show-with-captive-portal {
+.show-captive-portal-error .dont-show-with-captive-portal-error {
   display: none;
 }