Add UI components for license type selection in ChromeOS login UI.

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

 /* Copyright 2015 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. */
 
 #oauth-enrollment {
   height: 528px;
   padding: 0;
   width: 448px;
 }
 
@@ skipping 20 matching lines @@
   height: 480px;
   margin: 0 auto;
 }
 
 .oauth-enroll-state-active-directory-join-error
     #oauth-enroll-step-active-directory-join-error,
 .oauth-enroll-state-attribute-prompt-error
     #oauth-enroll-step-attribute-prompt-error,
 .oauth-enroll-state-signin #oauth-enroll-step-signin,
 .oauth-enroll-state-ad-join #oauth-enroll-step-ad-join,
+.oauth-enroll-state-license #oauth-enroll-step-license,
 .oauth-enroll-state-attribute-prompt
     #oauth-enroll-step-attribute-prompt {
   display: block;
   height: 100%;
   width: 100%;
 }
 
 #oauth-enroll-auth-view {
   display: block;
   height: 100%;
@@ skipping 68 matching lines @@
 
 .oauth-enroll-state-signin #oauth-enroll-navigation,
 .oauth-enroll-state-ad-join #oauth-enroll-navigation,
 .oauth-enroll-state-working #oauth-enroll-navigation {
   color: white;
 }
 
 #oauth-enrollment.saml #oauth-enroll-navigation {
   color: rgba(0, 0, 0, .54);
 }