[Merge to M53] arc: Implement safe access to ArcAuthService.

chrome/browser/chromeos/login/users/fake_chrome_user_manager.cc

 // 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 "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "base/sys_info.h"
 #include "chrome/browser/chromeos/login/users/chrome_user_manager.h"
@@ skipping 64 matching lines @@
       account_id.GetUserEmail()));
   user->SetStubImage(base::WrapUnique(new user_manager::UserImage(
                          *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
                              IDR_PROFILE_PICTURE_LOADING))),
                      user_manager::User::USER_IMAGE_PROFILE, false);
   users_.push_back(user);
   chromeos::ProfileHelper::Get()->SetProfileToUserMappingForTesting(user);
   return user;
 }
 
+bool FakeChromeUserManager::AreEphemeralUsersEnabled() const {
+  return fake_ephemeral_users_enabled_;
+}
+
 void FakeChromeUserManager::LoginUser(const AccountId& account_id) {
   UserLoggedIn(account_id, ProfileHelper::GetUserIdHashByUserIdForTesting(
                                account_id.GetUserEmail()),
                false /* browser_restart */);
 }
 
 BootstrapManager* FakeChromeUserManager::GetBootstrapManager() {
   return bootstrap_manager_;
 }
 
@@ skipping 182 matching lines @@
   NOTIMPLEMENTED();
   return;
 }
 
 bool FakeChromeUserManager::IsValidDefaultUserImageId(int image_index) const {
   NOTIMPLEMENTED();
   return false;
 }
 
 }  // namespace chromeos