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

chrome/browser/chromeos/kiosk_mode/kiosk_mode_helper.cc

Index: chrome/browser/chromeos/kiosk_mode/kiosk_mode_helper.cc
diff --git a/chrome/browser/chromeos/kiosk_mode/kiosk_mode_helper.cc b/chrome/browser/chromeos/kiosk_mode/kiosk_mode_helper.cc
index 7d01028967b4c151b38018815f0dbf65936cb9a8..92d47d22920d90cbcc1651023ed7660cb5321ada 100644
--- a/chrome/browser/chromeos/kiosk_mode/kiosk_mode_helper.cc
+++ b/chrome/browser/chromeos/kiosk_mode/kiosk_mode_helper.cc
@@ -16,6 +16,8 @@
 namespace {
 
 const int64 kScreensaverIdleTimeout = 60;
+const int64 kLoginIdleTimeout = 100;
+const int64 kLoginIdleCountdownTimeout = 20;
 
 }  // namespace
 
@@ -64,6 +66,20 @@ int64 KioskModeHelper::GetScreensaverTimeout() const {
   return kScreensaverIdleTimeout;
 }
 
+int64 KioskModeHelper::GetIdleLogoutTimeout() const {
+  if (!is_initialized_)
+    return -1;
+
+  return kLoginIdleTimeout;
+}
+int64 KioskModeHelper::GetIdleLogoutWarningTimeout() const {
+  if (!is_initialized_)
+    return -1;
+
+  return kLoginIdleCountdownTimeout;
+}
+
+
 KioskModeHelper::KioskModeHelper() : is_initialized_(false) {
 }