Stop calling EndSession() in chrome::ExitCleanly()

chrome/browser/lifetime/application_lifetime.cc

Index: chrome/browser/lifetime/application_lifetime.cc
diff --git a/chrome/browser/lifetime/application_lifetime.cc b/chrome/browser/lifetime/application_lifetime.cc
index be081a07ca6f21b25668f47d9838fa9957b94be3..c88d6559bc4ec5c8ad299c9fae3e5e91dee103e9 100644
--- a/chrome/browser/lifetime/application_lifetime.cc
+++ b/chrome/browser/lifetime/application_lifetime.cc
@@ -239,9 +239,8 @@ void AttemptExit() {
 #if defined(OS_CHROMEOS)
 // A function called when SIGTERM is received.
 void ExitCleanly() {
-  // We always mark exit cleanly because SessionManager may kill
-  // chrome in 3 seconds after SIGTERM.
-  g_browser_process->EndSession();
+  // We always mark exit cleanly.
+  MarkAsCleanShutdown();
 
   // Don't block when SIGTERM is received. AreaAllBrowsersCloseable()
   // can be false in following cases. a) power-off b) signout from