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..97715b0eeba61e4154004aafe880efe7f4a3ff53 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 user is allowed to shut down the
+// device. If set to true, all shutdown buttons in the UI will be replaced by
+// reboot buttons.
+const char kShutdownIsReboot[] = "cros.device.shutdown_is_reboot";
+
 }  // namespace chromeos