cros: Add SAML redirect banner for enrollment.

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

 // 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.
 
 login.createScreen('OAuthEnrollmentScreen', 'oauth-enrollment', function() {
   /** @const */ var STEP_SIGNIN = 'signin';
   /** @const */ var STEP_WORKING = 'working';
   /** @const */ var STEP_ERROR = 'error';
   /** @const */ var STEP_EXPLAIN = 'explain';
   /** @const */ var STEP_SUCCESS = 'success';
@@ skipping 163 matching lines @@
       url += '?gaiaUrl=' + encodeURIComponent(data.gaiaUrl);
       this.signInUrl_ = url;
       this.setIsAutoEnrollment(data.is_auto_enrollment);
       this.preventCancellation_ = data.prevent_cancellation;
       $('oauth-enroll-signin-frame').contentWindow.location.href =
           this.signInUrl_;
       if (this.preventCancellation_) {
         $('oauth-enroll-cancel-button').textContent =
             loadTimeData.getString('oauthEnrollCancelAutoEnrollmentGoBack');
       }
+      this.classList.toggle('saml', false);
 
       this.showStep(STEP_SIGNIN);
     },
 
     /**
      * Cancels enrollment and drops the user back to the login screen.
      */
     cancel: function() {
       if (this.isAutoEnrollment_)
         return;
@@ skipping 129 matching lines @@
 
       if (msg.method == 'retrieveAuthenticatedUserEmail') {
         // A user has successfully authenticated via SAML. However, the user's
         // identity is not known. Instead of reporting success immediately,
         // retrieve the user's e-mail address first.
         this.attemptToken_ = msg.attemptToken;
         this.showWorking(null);
         chrome.send('oauthEnrollRetrieveAuthenticatedUserEmail',
                     [msg.attemptToken]);
       }
+
+      if (msg.method == 'authPageLoaded') {
+        if (msg.isSAML) {
+          $('oauth-saml-notice-message').textContent = loadTimeData.getStringF(
+              'samlNotice',
+              msg.domain);
+        }
+        this.classList.toggle('saml', msg.isSAML);
+      }
     }
   };
 });