Implement the auto-logout on idle feature for Kiosk mode.

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index 579f7bc255e9ee54c0adf4fd14b9b2c7b2661a8e..e46f5f8fb84a7d5ccdc38a258de69e980c5dfb90 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -26,6 +26,7 @@
 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
 #include "chrome/browser/chromeos/input_method/xkeyboard.h"
 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_helper.h"
+#include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_idle_logout.h"
 #include "chrome/browser/chromeos/kiosk_mode/kiosk_mode_screensaver.h"
 #include "chrome/browser/chromeos/login/authenticator.h"
 #include "chrome/browser/chromeos/login/login_utils.h"
@@ -363,7 +364,11 @@ void ChromeBrowserMainPartsChromeos::PreProfileInit() {
 
   // Initialize the screen locker now so that it can receive
   // LOGIN_USER_CHANGED notification from UserManager.
-  chromeos::ScreenLocker::InitClass();
+  if (chromeos::KioskModeHelper::IsKioskModeEnabled()) {
+    chromeos::InitializeKioskModeIdleLogout();
+  } else {
+    chromeos::ScreenLocker::InitClass();
+  }
 
   // This forces the ProfileManager to be created and register for the
   // notification it needs to track the logged in user.