Add device policy to disallow shutdown - WebUI modifications

chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc b/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
index ea8ed29cef207005eaf8f9a9b802aab6f46987e5..2c9dad3e80319a430acaee5a9c3f19277dc5724c 100644
--- a/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
@@ -321,6 +321,11 @@ void CoreOobeHandler::ShowOobeUI(bool show) {
     UpdateOobeUIVisibility();
 }
 
+void CoreOobeHandler::UpdateShutdownAndRebootVisibility(
+    bool reboot_on_shutdown) {
+  CallJS("showShutdown", !reboot_on_shutdown);
+}
+
 void CoreOobeHandler::UpdateA11yState() {
   // TODO(dpolukhin): crbug.com/412891
   DCHECK(MagnificationManager::Get());