Reverting this as it causes browser tests on the Linux ChromiumOS builder to fail.

chrome/browser/policy/user_policy_signin_service_factory.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/policy/user_policy_signin_service_factory.h"
-
-#include "chrome/browser/policy/user_policy_signin_service.h"
-#include "chrome/browser/prefs/pref_service.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/profiles/profile_dependency_manager.h"
-#include "chrome/browser/signin/signin_manager_factory.h"
-#include "chrome/browser/signin/token_service_factory.h"
-#include "chrome/common/pref_names.h"
-
-namespace policy {
-
-UserPolicySigninServiceFactory::UserPolicySigninServiceFactory()
-    : ProfileKeyedServiceFactory("UserPolicySigninService",
-                                 ProfileDependencyManager::GetInstance()) {
-  DependsOn(TokenServiceFactory::GetInstance());
-  DependsOn(SigninManagerFactory::GetInstance());
-}
-
-UserPolicySigninServiceFactory::~UserPolicySigninServiceFactory() {}
-
-// static
-UserPolicySigninService* UserPolicySigninServiceFactory::GetForProfile(
-    Profile* profile) {
-  return static_cast<UserPolicySigninService*>(
-      GetInstance()->GetServiceForProfile(profile, true));
-}
-
-// static
-UserPolicySigninServiceFactory* UserPolicySigninServiceFactory::GetInstance() {
-  return Singleton<UserPolicySigninServiceFactory>::get();
-}
-
-ProfileKeyedService* UserPolicySigninServiceFactory::BuildServiceInstanceFor(
-    Profile* profile) const {
-  return new UserPolicySigninService(profile,
-                                     profile->GetUserCloudPolicyManager());
-}
-
-bool UserPolicySigninServiceFactory::ServiceIsCreatedWithProfile() {
-  // Create this object when the profile is created so it can track any
-  // user signin activity.
-  return true;
-}
-
-void UserPolicySigninServiceFactory::RegisterUserPrefs(
-    PrefService* user_prefs) {
-  user_prefs->RegisterBooleanPref(prefs::kLoadCloudPolicyOnSignin,
-                                  false, PrefService::UNSYNCABLE_PREF);
-}
-
-}  // namespace policy