user_manager component: Add UserManagerBase class.

chrome/browser/chromeos/login/users/fake_user_manager.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_CHROMEOS_LOGIN_USERS_FAKE_USER_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_FAKE_USER_MANAGER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 47 matching lines @@
   virtual void UpdateUserAccountData(
       const std::string& user_id,
       const UserAccountData& account_data) OVERRIDE {}
   virtual void Shutdown() OVERRIDE {}
   virtual MultiProfileUserController* GetMultiProfileUserController() OVERRIDE;
   virtual UserImageManager* GetUserImageManager(
       const std::string& user_id) OVERRIDE;
   virtual SupervisedUserManager* GetSupervisedUserManager() OVERRIDE;
   virtual const user_manager::UserList& GetLRULoggedInUsers() OVERRIDE;
   virtual user_manager::UserList GetUnlockUsers() const OVERRIDE;
-  virtual const std::string& GetOwnerEmail() OVERRIDE;
+  virtual const std::string& GetOwnerEmail() const OVERRIDE;
   virtual void SessionStarted() OVERRIDE {}
   virtual void RemoveUser(const std::string& email,
       RemoveUserDelegate* delegate) OVERRIDE {}
   virtual void RemoveUserFromList(const std::string& email) OVERRIDE;
   virtual bool IsKnownUser(const std::string& email) const OVERRIDE;
   virtual const user_manager::User* FindUser(
       const std::string& email) const OVERRIDE;
   virtual user_manager::User* FindUserAndModify(
       const std::string& email) OVERRIDE;
   virtual const user_manager::User* GetLoggedInUser() const OVERRIDE;
@@ skipping 61 matching lines @@
   // active user.
   std::string active_user_id_;
   MultiProfileUserController* multi_profile_user_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeUserManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_FAKE_USER_MANAGER_H_