cros: Change max users to be a constant

ash/common/session/session_controller.cc

 // 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.
 
 #include "ash/common/session/session_controller.h"
 
 #include <algorithm>
 
 #include "ash/common/session/session_state_observer.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "components/signin/core/account_id/account_id.h"
 #include "services/service_manager/public/cpp/connector.h"
 
 namespace ash {
 
 SessionController::SessionController() {}
 
 SessionController::~SessionController() {}
 
 void SessionController::BindRequest(mojom::SessionControllerRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 int SessionController::GetMaximumNumberOfLoggedInUsers() const {
-  return static_cast<int>(max_users_);
+  return session_manager::kMaxmiumNumberOfUserSessions;
 }
 
 int SessionController::NumberOfLoggedInUsers() const {
   return static_cast<int>(user_sessions_.size());
 }
 
 AddUserSessionPolicy SessionController::GetAddUserPolicy() const {
   return add_user_session_policy_;
 }
 
@@ skipping 49 matching lines @@
 void SessionController::RemoveSessionStateObserver(
     SessionStateObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void SessionController::SetClient(mojom::SessionControllerClientPtr client) {
   client_ = std::move(client);
 }
 
 void SessionController::SetSessionInfo(mojom::SessionInfoPtr info) {
-  max_users_ = info->max_users;
   can_lock_ = info->can_lock_screen;
   should_lock_screen_automatically_ = info->should_lock_screen_automatically;
   add_user_session_policy_ = info->add_user_session_policy;
   SetSessionState(info->state);
 }
 
 void SessionController::UpdateUserSession(mojom::UserSessionPtr user_session) {
   auto it =
       std::find_if(user_sessions_.begin(), user_sessions_.end(),
                    [&user_session](const mojom::UserSessionPtr& session) {
@@ skipping 51 matching lines @@
 void SessionController::AddUserSession(mojom::UserSessionPtr user_session) {
   const AccountId account_id(user_session->account_id);
 
   user_sessions_.push_back(std::move(user_session));
 
   for (auto& observer : observers_)
     observer.UserAddedToSession(account_id);
 }
 
 }  // namespace ash