Display "Restart to update" dialog to Chrome OS users.

ash/common/system/tray/system_tray_controller.cc

Index: ash/common/system/tray/system_tray_controller.cc
diff --git a/ash/common/system/tray/system_tray_controller.cc b/ash/common/system/tray/system_tray_controller.cc
index 659cd531d79de85487ef187c8ceb0328dc34f3dd..3b2089bcf3501fdecc7b7de36c8c386c550f498d 100644
--- a/ash/common/system/tray/system_tray_controller.cc
+++ b/ash/common/system/tray/system_tray_controller.cc
@@ -110,9 +110,9 @@ void SystemTrayController::SignOut() {
     system_tray_client_->SignOut();
 }
 
-void SystemTrayController::RequestRestartForUpdate() {
+void SystemTrayController::RequestRestartForUpdate(bool always_reboot) {
   if (system_tray_client_)
-    system_tray_client_->RequestRestartForUpdate();
+    system_tray_client_->RequestRestartForUpdate(always_reboot);
 }
 
 void SystemTrayController::BindRequest(mojom::SystemTrayRequest request) {