Add policy for limiting the session length

chrome/browser/chromeos/login/user_manager_impl.cc

Index: chrome/browser/chromeos/login/user_manager_impl.cc
diff --git a/chrome/browser/chromeos/login/user_manager_impl.cc b/chrome/browser/chromeos/login/user_manager_impl.cc
index f34484a599b16c285a83f2f161efdce1b5058f72..ab47a03d6539e01ff2296d1470cfd61e87052de7 100644
--- a/chrome/browser/chromeos/login/user_manager_impl.cc
+++ b/chrome/browser/chromeos/login/user_manager_impl.cc
@@ -582,6 +582,12 @@ bool UserManagerImpl::IsSessionStarted() const {
   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
@@ -614,10 +620,7 @@ bool UserManagerImpl::IsUserNonCryptohomeDataEphemeral(
   //    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) {