cros: Update SAML flow.

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

 // 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.
 
 /**
  * @fileoverview A simple message box screen implementation.
  */
 
-login.createScreen('MessageBoxScreen', 'message-box', function() { return {
+login.createScreen('FatalErrorScreen', 'fatal-error', function() { return {
     EXTERNAL_API: [
       'show'
     ],
 
     /**
      * Callback to run when the screen is dismissed.
      * @type {function()}
      */
     callback_: null,
 
     /**
-     * Ok button of the message box.
-     * @type {HTMLButtonElement}
-     */
-    okButton_: null,
-
-    /**
      * Saved hidden status of 'progress-dots'.
      * @type {boolean}
      */
     savedProgressDotsHidden_: null,
 
-    /**
-     * Screen controls in bottom strip.
-     * @type {Array.<HTMLButtonElement>} Buttons to be put in the bottom strip.
-     */
-    get buttons() {
-      var buttons = [];
-
-      this.okButton_ = this.ownerDocument.createElement('button');
-      this.okButton_.addEventListener('click', this.onDismiss_.bind(this));
-      buttons.push(this.okButton_);
-
-      return buttons;
+    /** @override */
+    decorate: function() {
+      $('fatal-error-dismiss-button').addEventListener(
+          'click', this.onDismiss_.bind(this));
     },
 
     get defaultControl() {
-      return this.okButton_;
+      return $('fatal-error-dismiss-button');
     },
 
     /**
      * Invoked when user clicks on the ok button.
      */
     onDismiss_: function() {
       this.callback_();
       $('progress-dots').hidden = this.savedProgressDotsHidden_;
     },
 
     /**
      * Shows the no password warning screen.
-     * @param {string} title Title string of the message box.
-     * @param {string} message Body text of the message box.
-     * @param {string} okLabel Label text for the okay button.
      * @param {function()} callback The callback to be invoked when the
      *     screen is dismissed.
      */
-    show: function(title, message, okLabel, callback) {
-      $('message-box-title').textContent = title;
-      $('message-box-body').textContent = message;
-      this.okButton_.textContent = okLabel;
+    show: function(callback) {
+      Oobe.getInstance().headerHidden = true;
       this.callback_ = callback;
 
-      Oobe.showScreen({id: SCREEN_MESSAGE_BOX});
+      Oobe.showScreen({id: SCREEN_FATAL_ERROR});
 
       this.savedProgressDotsHidden_ = $('progress-dots').hidden;
       $('progress-dots').hidden = true;
     }
   };
 });