Added UI to enable debugging features on CrOS

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

 /* Copyright 2013 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.
  */
 
 #connect {
   min-height: 395px;
   padding: 70px 17px 21px;
 }
 
@@ skipping 11 matching lines @@
   color: #444;
   font-size: 16px;
   margin-bottom: 30px;
 }
 
 #connect .step-contents {
   margin: 33px auto 82px;
   width: 435px;
 }
 
+.connect-debugging-specific {
+  display: none;
+}
+
+.connect-debugging-view .connect-debugging-specific {
+  display: block;
+}
+
 html:not([highlight=strong]) #network-timezone-setting {
   display: none;
 }