[cros] Fix first time Guest sign in.

chrome/browser/chromeos/login/existing_user_controller.cc

 // Copyright (c) 2011 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/existing_user_controller.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 441 matching lines @@
     host_ = NULL;
   }
   login_display_->OnFadeOut();
 }
 
 void ExistingUserController::OnOffTheRecordLoginSuccess() {
   if (WizardController::IsDeviceRegistered()) {
     LoginUtils::Get()->CompleteOffTheRecordLogin(guest_mode_url_);
   } else {
     // Postpone CompleteOffTheRecordLogin until registration completion.
+    // TODO(nkostylev): Kind of hack. We have to instruct UserManager here
+    // that we're actually logged in as Guest user as we'll ask UserManager
+    // later in the code path whether we've signed in as Guest and depending
+    // on that would either show image screen or call CompleteOffTheRecordLogin.
+    UserManager::Get()->GuestUserLoggedIn();
     ActivateWizard(WizardController::kRegistrationScreenName);
   }
 
   if (login_status_consumer_)
     login_status_consumer_->OnOffTheRecordLoginSuccess();
 }
 
 void ExistingUserController::OnPasswordChangeDetected(
     const GaiaAuthConsumer::ClientLoginResult& credentials) {
   // Must not proceed without signature verification.
@@ skipping 115 matching lines @@
     cryptohomed->AsyncSetOwnerUser(
         UserCrosSettingsProvider::cached_owner(), NULL);
 
     // Do not invoke AsyncDoAutomaticFreeDiskSpaceControl(NULL) here
     // so it does not delay the following mount. Cleanup will be
     // started in Cryptohomed by timer.
   }
 }
 
 }  // namespace chromeos