Use MountGuestAndGetHash() instead of MountGuest() for retail mode

chrome/browser/chromeos/login/auth/parallel_authenticator.cc

 // Copyright 2014 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 "chrome/browser/chromeos/login/auth/parallel_authenticator.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 311 matching lines @@
   // Note: |kRetailModeUserEMail| is used in other places to identify a retail
   // mode session.
   current_state_.reset(
       new AuthAttemptState(UserContext(UserManager::kRetailModeUserName),
                            user_manager::USER_TYPE_RETAIL_MODE,
                            false,    // unlock
                            false,    // online_complete
                            false));  // user_is_new
   remove_user_data_on_failure_ = false;
   ephemeral_mount_attempted_ = true;
-  MountGuest(current_state_.get(),
-             scoped_refptr<ParallelAuthenticator>(this));
+  MountGuestAndGetHash(current_state_.get(),
+                       scoped_refptr<ParallelAuthenticator>(this));
 }
 
 void ParallelAuthenticator::LoginOffTheRecord() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   current_state_.reset(
       new AuthAttemptState(UserContext(UserManager::kGuestUserName),
                            user_manager::USER_TYPE_GUEST,
                            false,    // unlock
                            false,    // online_complete
                            false));  // user_is_new
@@ skipping 470 matching lines @@
   Resolve();
 }
 
 void ParallelAuthenticator::SetOwnerState(bool owner_check_finished,
                                           bool check_result) {
   owner_is_verified_ = owner_check_finished;
   user_can_login_ = check_result;
 }
 
 }  // namespace chromeos