Skip the SAML confirm password screen when a single password is scraped

chrome/browser/resources/gaia_auth_host/saml_handler.js

 // 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.
 
 <include src="post_message_channel.js">
 
 /**
  * @fileoverview Saml support for webview based auth.
  */
 
@@ skipping 180 matching lines @@
 
     /**
      * Returns the Saml API password bytes.
      * @return {string}
      */
     get apiPasswordBytes() {
       return this.apiPasswordBytes_;
     },
 
     /**
+     * Returns the first scraped password if any, or an empty string otherwise.
+     * @return {string}
+     */
+    get firstScrapedPassword() {
+      var scraped = this.getConsolidatedScrapedPasswords_();
+      return scraped.length ? scraped[0] : '';
+    },
+
+    /**
      * Returns the number of scraped passwords.
      * @return {number}
      */
     get scrapedPasswordCount() {
       return this.getConsolidatedScrapedPasswords_().length;
     },
 
     /**
      * Gets the de-duped scraped passwords.
      * @return {Array<string>}
@@ skipping 241 matching lines @@
 
     onGetSAMLFlag_: function(channel, msg) {
       return this.isSamlPage_;
     },
   };
 
   return {
     SamlHandler: SamlHandler
   };
 });