user_manager: Remove deps on session_manager

chrome/browser/chromeos/login/users/chrome_user_manager_impl.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_CHROME_USER_MANAGER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_CHROME_USER_MANAGER_IMPL_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 65 matching lines @@
   UserFlow* GetUserFlow(const AccountId& account_id) const override;
   void SetUserFlow(const AccountId& account_id, UserFlow* flow) override;
   void ResetUserFlow(const AccountId& account_id) override;
 
   // UserManager implementation:
   void Shutdown() override;
   user_manager::UserList GetUsersAllowedForMultiProfile() const override;
   user_manager::UserList GetUsersAllowedForSupervisedUsersCreation()
       const override;
   user_manager::UserList GetUnlockUsers() const override;
-  void SessionStarted() override;
   void SaveUserOAuthStatus(
       const AccountId& account_id,
       user_manager::User::OAuthTokenStatus oauth_token_status) override;
   void SaveUserDisplayName(const AccountId& account_id,
                            const base::string16& display_name) override;
   bool CanCurrentUserLock() const override;
   bool IsUserNonCryptohomeDataEphemeral(
       const AccountId& account_id) const override;
   bool AreSupervisedUsersAllowed() const override;
   void UpdateLoginState(const user_manager::User* active_user,
@@ skipping 189 matching lines @@
   std::unique_ptr<BootstrapManager> bootstrap_manager_;
 
   base::WeakPtrFactory<ChromeUserManagerImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeUserManagerImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_CHROME_USER_MANAGER_IMPL_H_