iOS factories for ProfileOAuth2TokenService and AccountTrackerService

ios/chrome/browser/signin/account_tracker_service_factory.h

Index: ios/chrome/browser/signin/account_tracker_service_factory.h
diff --git a/ios/chrome/browser/signin/account_tracker_service_factory.h b/ios/chrome/browser/signin/account_tracker_service_factory.h
new file mode 100644
index 0000000000000000000000000000000000000000..b4f4655a2ccae88f95837240c6eab9a4d7d364eb
--- /dev/null
+++ b/ios/chrome/browser/signin/account_tracker_service_factory.h
@@ -0,0 +1,51 @@
+// 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_ACCOUNT_TRACKER_SERVICE_FACTORY_H_
+#define IOS_CHROME_BROWSER_SIGNIN_ACCOUNT_TRACKER_SERVICE_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+
+class AccountTrackerService;
+template <typename T>
+struct DefaultSingletonTraits;
+
+namespace ios {
+
+class ChromeBrowserState;
+
+// Singleton that owns all AccountTrackerServices and associates them with
+// ios::ChromeBrowserState.
+class AccountTrackerServiceFactory : public BrowserStateKeyedServiceFactory {
+ public:
+  // Returns the instance of AccountTrackerService associated with this
+  // browser state (creating one if none exists). Returns nullpte if this

[sdefresne, 2015/07/21 14:29:42]

nit: s/nullpte/null/

+  // browser state cannot have a AccountTrackerService (for example, if
+  // |browser_state| is incognito).
+  static AccountTrackerService* GetForBrowserState(
+      ios::ChromeBrowserState* browser_state);
+
+  // Returns an instance of the AccountTrackerServiceFactory singleton.

[sdefresne, 2015/07/21 14:29:43]

nit: s/an/the/

+  static AccountTrackerServiceFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<AccountTrackerServiceFactory>;
+
+  AccountTrackerServiceFactory();
+  ~AccountTrackerServiceFactory() override;
+
+  // BrowserStateKeyedServiceFactory implementation.
+  void RegisterBrowserStatePrefs(
+      user_prefs::PrefRegistrySyncable* registry) override;
+  scoped_ptr<KeyedService> BuildServiceInstanceFor(
+      web::BrowserState* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(AccountTrackerServiceFactory);
+};
+
+}  // namespace ios
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_ACCOUNT_TRACKER_SERVICE_FACTORY_H_