Add device policy to disallow shutdown

chromeos/settings/cros_settings_names.cc

Index: chromeos/settings/cros_settings_names.cc
diff --git a/chromeos/settings/cros_settings_names.cc b/chromeos/settings/cros_settings_names.cc
index 37fa6e8a2be845676da3607851c644320317f7fb..db55f29f17f48a6024908392b68352abe36806f3 100644
--- a/chromeos/settings/cros_settings_names.cc
+++ b/chromeos/settings/cros_settings_names.cc
@@ -160,4 +160,9 @@ const char kDeviceDisabled[] = "cros.device_disabled";
 // the device is disabled.
 const char kDeviceDisabledMessage[] = "cros.disabled_state.message";
 
+// A boolean pref that indicates whether the device automatically reboots when
+// the user initiates a shutdown via an UI element.  If set to true, all
+// shutdown buttons in the UI will be replaced by reboot buttons.
+const char kRebootOnShutdown[] = "cros.device.reboot_on_shutdown";
+
 }  // namespace chromeos