Clean up SessionStateDelegate in chrome

chrome/browser/ui/ash/system_tray_delegate_chromeos.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_UI_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_
 #define CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "ash/common/accessibility_types.h"
-#include "ash/common/session/session_state_observer.h"
 #include "ash/common/system/chromeos/supervised/custodian_info_tray_observer.h"
 #include "ash/common/system/tray/ime_info.h"
 #include "ash/common/system/tray/system_tray_delegate.h"
 #include "base/callback_forward.h"
 #include "base/callback_list.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
@@ skipping 26 matching lines @@
 namespace chromeos {
 
 class SystemTrayDelegateChromeOS
     : public ui::ime::InputMethodMenuManager::Observer,
       public ash::SystemTrayDelegate,
       public SessionManagerClient::Observer,
       public content::NotificationObserver,
       public input_method::InputMethodManager::Observer,
       public device::BluetoothAdapter::Observer,
       public policy::CloudPolicyStore::Observer,
-      public ash::SessionStateObserver,
       public chrome::BrowserListObserver,
       public extensions::AppWindowRegistry::Observer,
       public user_manager::UserManager::Observer,
       public user_manager::UserManager::UserSessionStateObserver,
       public SupervisedUserServiceObserver,
       public input_method::InputMethodManager::ImeMenuObserver {
  public:
   SystemTrayDelegateChromeOS();
 
   ~SystemTrayDelegateChromeOS() override;
@@ skipping 116 matching lines @@
 
   void OnStartBluetoothDiscoverySession(
       std::unique_ptr<device::BluetoothDiscoverySession> discovery_session);
 
   void UpdateEnterpriseDomain();
 
   // Overridden from CloudPolicyStore::Observer
   void OnStoreLoaded(policy::CloudPolicyStore* store) override;
   void OnStoreError(policy::CloudPolicyStore* store) override;
 
-  // Overridden from ash::SessionStateObserver
-  void UserAddedToSession(const AccountId& account_id) override;
-  void ActiveUserChanged(const AccountId& account_id) override;
-
   // Overridden from chrome::BrowserListObserver:
   void OnBrowserRemoved(Browser* browser) override;
 
   // Overridden from extensions::AppWindowRegistry::Observer:
   void OnAppWindowRemoved(extensions::AppWindow* app_window) override;
 
   // Overridden from SupervisedUserServiceObserver:
   void OnCustodianInfoChanged() override;
 
   void OnAccessibilityStatusChanged(
@@ skipping 37 matching lines @@
   base::WeakPtrFactory<SystemTrayDelegateChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemTrayDelegateChromeOS);
 };
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate();
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_ASH_SYSTEM_TRAY_DELEGATE_CHROMEOS_H_