Do not reload account picker when device-local account policy changes

chrome/browser/chromeos/login/screens/user_selection_screen.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_SCREENS_USER_SELECTION_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_
 
 #include <map>
 #include <string>
 
-#include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/timer/timer.h"
 #include "base/values.h"
 #include "chrome/browser/signin/screenlock_bridge.h"
 #include "components/user_manager/user.h"
 #include "ui/wm/core/user_activity_observer.h"
 
 namespace chromeos {
 
 class LoginDisplayWebUIHandler;
 
 // This class represents User Selection screen: user pod-based login screen.
 class UserSelectionScreen : public wm::UserActivityObserver {
  public:
   UserSelectionScreen();
   virtual ~UserSelectionScreen();
 
   static const user_manager::UserList PrepareUserListForSending(
       const user_manager::UserList& users,
       std::string owner,
       bool is_signin_to_add);
 
   void SetHandler(LoginDisplayWebUIHandler* handler);
 
-  void Init(const user_manager::UserList& users, bool show_guest);
+  virtual void Init(const user_manager::UserList& users, bool show_guest);
   const user_manager::UserList& GetUsers() const;
   void OnUserImageChanged(const user_manager::User& user);
   void OnBeforeUserRemoved(const std::string& username);
   void OnUserRemoved(const std::string& username);
 
   void OnPasswordClearTimerExpired();
-  void SendUserList();
+  virtual void SendUserList();
   void HandleGetUsers();
   void SetAuthType(const std::string& username,
                    ScreenlockBridge::LockHandler::AuthType auth_type);
   ScreenlockBridge::LockHandler::AuthType GetAuthType(
       const std::string& username) const;
 
   // wm::UserActivityDetector implementation:
   virtual void OnUserActivity(const ui::Event* event) OVERRIDE;
 
   // Fills |user_dict| with information about |user|.
   static void FillUserDictionary(
       user_manager::User* user,
       bool is_owner,
       bool is_signin_to_add,
       ScreenlockBridge::LockHandler::AuthType auth_type,
       base::DictionaryValue* user_dict);
 
   // Determines if user auth status requires online sign in.
   static bool ShouldForceOnlineSignIn(const user_manager::User* user);
 
- private:
+ protected:
   LoginDisplayWebUIHandler* handler_;
 
   // Set of Users that are visible.
   user_manager::UserList users_;
 
+ private:
   // Whether to show guest login.
   bool show_guest_;
 
   // Map of usernames to their current authentication type. If a user is not
   // contained in the map, it is using the default authentication type.
   std::map<std::string, ScreenlockBridge::LockHandler::AuthType>
       user_auth_type_map_;
 
   // Timer for measuring idle state duration before password clear.
   base::OneShotTimer<UserSelectionScreen> password_clear_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(UserSelectionScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_