ServiceWorker: Update the install sequence as per the latest spec

content/browser/service_worker/service_worker_registration.cc

Index: content/browser/service_worker/service_worker_registration.cc
diff --git a/content/browser/service_worker/service_worker_registration.cc b/content/browser/service_worker/service_worker_registration.cc
index 51bd701c358ca9ba5b8de9dac19d53e6da8da919..33fdfa6767fee298fafa53e31041cca2d786cf80 100644
--- a/content/browser/service_worker/service_worker_registration.cc
+++ b/content/browser/service_worker/service_worker_registration.cc
@@ -66,6 +66,10 @@ void ServiceWorkerRegistration::NotifyRegistrationFailed() {
   FOR_EACH_OBSERVER(Listener, listeners_, OnRegistrationFailed(this));
 }
 
+void ServiceWorkerRegistration::NotifyUpdateFound() {
+  FOR_EACH_OBSERVER(Listener, listeners_, OnUpdateFound(this));
+}
+
 ServiceWorkerRegistrationInfo ServiceWorkerRegistration::GetInfo() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   return ServiceWorkerRegistrationInfo(