Added a message that suggest to configure a proxy for a network.

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

 /* Copyright (c) 2012 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.
  *
  * This is the stylesheet used by the Out of the box experience (OOBE) flow,
  * sign in and lock screens.
  */
 
 html,
 body {
@@ skipping 80 matching lines @@
   padding-top: 1px;
 }
 
 #header span {
   text-transform: lowercase;
 }
 
 #header span,
 #user-image-screen-curtain p,
 .label,
+.flexible-label,
 .menu-control {
   cursor: default;
 }
 
 #header-sections {
   display: inline-block;
   height: 30px;
   position: relative;
 }
 
@@ skipping 106 matching lines @@
   margin: 5px;
 }
 
 .menu-control {
   font-family: inherit;
   line-height: 20px;
   position: relative;
   width: 250px;
 }
 
-.label {
+.label,
+.flexible-label {
   display: block;
   margin: 5px 5px 5px 0;
   padding: 5px 5px 5px 0;
+}
+
+.label {
   width: 170px;
 }
 
+.flexible-label {
+  max-width: 250px;
+}
+
 #connect {
   box-sizing: border-box;
   padding: 60px 0 0 145px;
 }
 
 #logging {
   clear: both;
   font-size: small;
   margin-top: 20px;
   width: 500px;
@@ skipping 514 matching lines @@
 }
 
 #notification-area a {
   color: rgb(37, 79, 155);
 }
 
 #notification-area .butter-bar {
   margin: 0 auto;
   max-width: 850px;
 }