iOS factories for SigninManager and GaiaCookieManagerService

ios/chrome/browser/signin/signin_manager_factory_observer.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_SIGNIN_MANAGER_FACTORY_OBSERVER_H_
+#define IOS_CHROME_BROWSER_SIGNIN_SIGNIN_MANAGER_FACTORY_OBSERVER_H_
+
+#include "base/macros.h"
+
+class SigninManager;
+
+// Observer for SigninManagerFactory.
+class SigninManagerFactoryObserver {
+ public:
+  SigninManagerFactoryObserver() {}
+  virtual ~SigninManagerFactoryObserver() {}
+
+  // Called when a SigninManager instance is created.
+  virtual void SigninManagerCreated(SigninManager* manager) {}
+
+  // Called when a SigninManager instance is being shut down. Observers
+  // of |manager| should remove themselves at this point.
+  virtual void SigninManagerShutdown(SigninManager* manager) {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SigninManagerFactoryObserver);
+};
+
+#endif  // IOS_CHROME_BROWSER_SIGNIN_SIGNIN_MANAGER_FACTORY_OBSERVER_H_