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 ProfileOAuth2TokenService associated with this

[guohui, 2014/08/20 18:05:23]

nits: i guess you mean AccountTrackerService here?

[Roger Tawa OOO till Jul 10th, 2014/08/21 01:30:16]

Done.

+  // profile (creating one if none exists). Returns NULL if this profile
+  // cannot have a ProfileOAuth2TokenService (for example, if |profile| is
+  // incognito).
+  static AccountTrackerService* GetForProfile(Profile* profile);
+
+  // Returns an instance of the ProfileOAuth2TokenServiceFactory singleton.

[guohui, 2014/08/20 18:05:23]

same here.

[Roger Tawa OOO till Jul 10th, 2014/08/21 01:30:16]

Done.

+  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_