Revert of Create a new AccountTrackerService

chrome/browser/signin/account_tracker_service_factory.h

-// Copyright 2014 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.
-
-#ifndef CHROME_BROWSER_SIGNIN_ACCOUNT_TRACKER_SERVICE_FACTORY_H_
-#define CHROME_BROWSER_SIGNIN_ACCOUNT_TRACKER_SERVICE_FACTORY_H_
-
-#include "base/memory/singleton.h"
-#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
-
-class AccountTrackerService;
-class Profile;
-
-// Singleton that owns all AccountTrackerServices and associates them with
-// Profiles. Listens for the Profile's destruction notification and cleans up
-// the associated AccountTrackerService.
-class AccountTrackerServiceFactory
-    : public BrowserContextKeyedServiceFactory {
- public:
-  // Returns the instance of AccountTrackerService associated with this
-  // profile (creating one if none exists). Returns NULL if this profile
-  // cannot have a AccountTrackerService (for example, if |profile| is
-  // incognito).
-  static AccountTrackerService* GetForProfile(Profile* profile);
-
-  // Returns an instance of the AccountTrackerServiceFactory singleton.
-  static AccountTrackerServiceFactory* GetInstance();
-
- private:
-  friend struct DefaultSingletonTraits<AccountTrackerServiceFactory>;
-
-  AccountTrackerServiceFactory();
-  virtual ~AccountTrackerServiceFactory();
-
-  // BrowserContextKeyedServiceFactory implementation.
-  virtual void RegisterProfilePrefs(
-      user_prefs::PrefRegistrySyncable* registry) OVERRIDE;
-  virtual KeyedService* BuildServiceInstanceFor(
-      content::BrowserContext* context) const OVERRIDE;
-
-  DISALLOW_COPY_AND_ASSIGN(AccountTrackerServiceFactory);
-};
-
-#endif  // CHROME_BROWSER_SIGNIN_ACCOUNT_TRACKER_SERVICE_FACTORY_H_