OAuth2LoginManager+MergeSessionThrottle hardening, multi-profle support

chrome/browser/chromeos/login/oauth2_login_manager_factory.h

+// Copyright 2013 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_CHROMEOS_LOGIN_OAUTH2_LOGIN_MANAGER_FACTORY_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH2_LOGIN_MANAGER_FACTORY_H_
+
+#include "base/memory/singleton.h"
+#include "components/browser_context_keyed_service/browser_context_keyed_service_factory.h"
+
+class Profile;
+
+namespace chromeos {
+
+class OAuth2LoginManager;
+
+// Singleton that owns all OAuth2LoginManager and associates them with
+// Profiles. Listens for the Profile's destruction notification and cleans up
+// the associated OAuth2LoginManager.
+class OAuth2LoginManagerFactory
+    : public BrowserContextKeyedServiceFactory {
+ public:
+  // Returns the instance of OAuth2LoginManager associated with this
+  // |profile| (creates one if none exists).
+  static OAuth2LoginManager* GetForProfile(Profile* profile);
+
+  // Returns an instance of the OAuth2LoginManagerFactory singleton.
+  static OAuth2LoginManagerFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<OAuth2LoginManagerFactory>;
+
+  OAuth2LoginManagerFactory();
+  virtual ~OAuth2LoginManagerFactory();
+
+  // BrowserContextKeyedServiceFactory implementation.
+  virtual BrowserContextKeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(OAuth2LoginManagerFactory);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH2_LOGIN_MANAGER_FACTORY_H_