Add a mojo interface for AccountId

chrome/browser/ui/ash/session_controller_client.h

 // Copyright 2016 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_SESSION_CONTROLLER_CLIENT_H_
 #define CHROME_BROWSER_UI_ASH_SESSION_CONTROLLER_CLIENT_H_
 
 #include "ash/public/interfaces/session_controller.mojom.h"
 #include "base/macros.h"
 #include "components/session_manager/core/session_manager_observer.h"
@@ skipping 14 matching lines @@
 class SessionControllerClient
     : public ash::mojom::SessionControllerClient,
       public user_manager::UserManager::UserSessionStateObserver,
       public session_manager::SessionManagerObserver {
  public:
   SessionControllerClient();
   ~SessionControllerClient() override;
 
   // ash::mojom::SessionControllerClient:
   void RequestLockScreen() override;
-  void SwitchActiveUser(const std::string& serialized_account_id) override;
+  void SwitchActiveUser(const AccountId& account_id) override;
   void CycleActiveUser(bool next_user) override;
 
   // user_manager::UserManager::UserSessionStateObserver:
   void ActiveUserChanged(const user_manager::User* active_user) override;
   void UserAddedToSession(const user_manager::User* added_user) override;
 
   // session_manager::SessionManagerObserver:
   void OnSessionStateChanged() override;
 
   // TODO(xiyuan): Remove after SessionStateDelegateChromeOS is gone.
@@ skipping 29 matching lines @@
 
   // Whether the primary user session info is sent to ash.
   bool primary_user_session_sent_ = false;
 
   ash::mojom::SessionInfoPtr last_sent_session_info_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionControllerClient);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_SESSION_CONTROLLER_CLIENT_H_