Add policy for limiting the session length

chrome/browser/chromeos/login/user_manager_impl.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/login/user_manager_impl.h"
 
 #include <cstddef>
 #include <set>
 #include <vector>
 
@@ skipping 564 matching lines @@
 bool UserManagerImpl::IsLoggedInAsStub() const {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return IsUserLoggedIn() && logged_in_user_->email() == kStubUser;
 }
 
 bool UserManagerImpl::IsSessionStarted() const {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   return session_started_;
 }
 
+bool UserManagerImpl::HasBrowserRestarted() const {
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  return command_line->HasSwitch(switches::kLoginManager) &&
+         !command_line->HasSwitch(switches::kLoginPassword);
+}
+
 bool UserManagerImpl::IsUserNonCryptohomeDataEphemeral(
     const std::string& email) const {
   // Data belonging to the guest, retail mode and stub users is always
   // ephemeral.
   if (email == kGuestUserEMail || email == kRetailModeUserEMail ||
       email == kStubUser) {
     return true;
   }
 
   // Data belonging to the owner, anyone found on the user list and obsolete
@@ skipping 12 matching lines @@
   if (IsUserLoggedIn() && (email == GetLoggedInUser()->email()) &&
       (is_current_user_ephemeral_regular_user_ || !IsLoggedInAsRegularUser())) {
     return true;
   }
 
   // Data belonging to any other user is ephemeral when:
   // a) Going through the regular login flow and the ephemeral users policy is
   //    enabled.
   //    - or -
   // b) The browser is restarting after a crash.
-  return AreEphemeralUsersEnabled() ||
-         (base::chromeos::IsRunningOnChromeOS() &&
-          !CommandLine::ForCurrentProcess()->
-              HasSwitch(switches::kLoginManager));
+  return AreEphemeralUsersEnabled() || HasBrowserRestarted();
 }
 
 void UserManagerImpl::AddObserver(UserManager::Observer* obs) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   observer_list_.AddObserver(obs);
 }
 
 void UserManagerImpl::RemoveObserver(UserManager::Observer* obs) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   observer_list_.RemoveObserver(obs);
@@ skipping 274 matching lines @@
       users_.insert(users_.begin(), User::CreatePublicAccountUser(*it));
   }
 
   user_image_manager_->LoadUserImages(
       UserList(users_.begin(), users_.begin() + new_public_accounts.size()));
 
   return true;
 }
 
 }  // namespace chromeos