[cros] Fake a stub user login when no --login-manager and --login-user are given.

chrome/browser/chromeos/login/user_manager.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.h"
 
 #include "base/synchronization/lock.h"
 #include "chrome/browser/chromeos/login/user_manager_impl.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace chromeos {
 
 // static
 const char UserManager::kLoggedInUsers[] = "LoggedInUsers";
+const char UserManager::kStubUser[] = "stub-user@example.com";
 const char UserManager::kUserWallpapers[] = "UserWallpapers";
 const char UserManager::kUserWallpapersProperties[] =
     "UserWallpapersProperties";
 const char UserManager::kUserImages[] = "UserImages";
 const char UserManager::kUserDisplayName[] = "UserDisplayName";
 const char UserManager::kUserDisplayEmail[] = "UserDisplayEmail";
 const char UserManager::kUserOAuthTokenStatus[] = "OAuthTokenStatus";
 
 // Class that is holds pointer to UserManager instance.
 // One could set UserManager mock instance through it (see UserManager::Set).
@@ skipping 62 matching lines @@
   local_state->RegisterDictionaryPref(kUserDisplayName,
                                       PrefService::UNSYNCABLE_PREF);
   local_state->RegisterDictionaryPref(kUserDisplayEmail,
                                       PrefService::UNSYNCABLE_PREF);
 }
 
 UserManager::~UserManager() {
 }
 
 }  // namespace chromeos