iOS factories for ProfileOAuth2TokenService and AccountTrackerService

ios/chrome/browser/signin/oauth2_token_service_factory.h

+// 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.
+
+#ifndef IOS_CHROME_BROWSER_SIGNIN_OAUTH2_TOKEN_SERVICE_FACTORY_H_
+#define IOS_CHROME_BROWSER_SIGNIN_OAUTH2_TOKEN_SERVICE_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+
+namespace ios {
+class ChromeBrowserState;
+}
+
+template <typename T>
+struct DefaultSingletonTraits;
+class ProfileOAuth2TokenService;
+
+// Singleton that owns all ProfileOAuth2TokenServices and associates them with
+// ios::ChromeBrowserState.
+class OAuth2TokenServiceFactory : public BrowserStateKeyedServiceFactory {
+ public:
+  // Returns the instance of ProfileOAuth2TokenService associated with this
+  // browser state (creating one if none exists). Returns nulltpr if this
+  // browser state cannot have a ProfileOAuth2TokenService (for example, if
+  // |browser_state| is incognito).
+  static ProfileOAuth2TokenService* GetForBrowserState(
+      ios::ChromeBrowserState* browser_state);
+
+  // Returns an instance of the OAuth2TokenServiceFactory singleton.
+  static OAuth2TokenServiceFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<OAuth2TokenServiceFactory>;
+
+  OAuth2TokenServiceFactory();
+  ~OAuth2TokenServiceFactory() override;
+
+  // BrowserStateKeyedServiceFactory implementation.
+  scoped_ptr<KeyedService> BuildServiceInstanceFor(
+      web::BrowserState* context) const override;
+  void RegisterBrowserStatePrefs(
+      user_prefs::PrefRegistrySyncable* registry) override;
+
+  DISALLOW_COPY_AND_ASSIGN(OAuth2TokenServiceFactory);
+};
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_OAUTH2_TOKEN_SERVICE_FACTORY_H_