Lock screen for Chrome-Athena

athena/system/power_button_controller.cc

Index: athena/system/power_button_controller.cc
diff --git a/athena/system/power_button_controller.cc b/athena/system/power_button_controller.cc
index e1105b90e9ad458f4816dfc5d525aa5e4247813d..a96f015143b08a48fcaa52ac21a2a5ba9874887c 100644
--- a/athena/system/power_button_controller.cc
+++ b/athena/system/power_button_controller.cc
@@ -5,6 +5,7 @@
 #include "athena/system/power_button_controller.h"
 
 #include "athena/screen/public/screen_manager.h"
+#include "athena/screen_lock/public/screen_lock_manager.h"
 #include "athena/strings/grit/athena_strings.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -44,6 +45,10 @@ PowerButtonController::~PowerButtonController() {
 void PowerButtonController::ShowShutdownWarningDialog() {
   state_ = STATE_SHUTDOWN_WARNING_VISIBLE;
 
+  // Lock screen manager exists inside user session only.
+  if (athena::ScreenLockManager::Get())
+    athena::ScreenLockManager::Get()->LockScreen();
+
   shutdown_warning_message_.reset(new views::Widget);
 
   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);