Fix memory uninit

chrome/browser/chromeos/login/user_manager_impl.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/user_manager_impl.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "ash/desktop_background/desktop_background_controller.h"
@@ skipping 423 matching lines @@
 void UserManagerImpl::EphemeralUserLoggedIn(const std::string& email) {
   is_current_user_new_ = true;
   is_current_user_ephemeral_ = true;
   logged_in_user_ = CreateUser(email);
   SetInitialUserImage(email);
   NotifyOnLogin();
 }
 
 void UserManagerImpl::StubUserLoggedIn() {
   is_current_user_ephemeral_ = true;
+  current_user_wallpaper_index_ = ash::GetGuestWallpaperIndex();
   logged_in_user_ = new User(kStubUser, false);
   logged_in_user_->SetImage(GetDefaultImage(kStubDefaultImageIndex),
                             kStubDefaultImageIndex);
 }
 
 void UserManagerImpl::RemoveUser(const std::string& email,
                                  RemoveUserDelegate* delegate) {
   if (!IsKnownUser(email))
     return;
 
@@ skipping 802 matching lines @@
     BrowserThread::PostTask(
         BrowserThread::FILE,
         FROM_HERE,
         base::Bind(&UserManagerImpl::DeleteUserImage,
                    base::Unretained(this),
                    image_path));
   }
 }
 
 }  // namespace chromeos