ServiceWorker: Implement ServiceWorkerRegistration.update() (2)

content/child/service_worker/web_service_worker_provider_impl.cc

Index: content/child/service_worker/web_service_worker_provider_impl.cc
diff --git a/content/child/service_worker/web_service_worker_provider_impl.cc b/content/child/service_worker/web_service_worker_provider_impl.cc
index 96185668c0ec5f38b6cadf53376601a33708e30e..8c9855b3c3d639d1622122baa3e2fe5b2791c3aa 100644
--- a/content/child/service_worker/web_service_worker_provider_impl.cc
+++ b/content/child/service_worker/web_service_worker_provider_impl.cc
@@ -76,6 +76,10 @@ void WebServiceWorkerProviderImpl::getRegistrationForReady(
   GetDispatcher()->GetRegistrationForReady(context_->provider_id(), callbacks);
 }
 
+int WebServiceWorkerProviderImpl::provider_id() const {
+  return context_->provider_id();
+}
+
 void WebServiceWorkerProviderImpl::RemoveProviderClient() {
   // Remove the provider client, but only if the dispatcher is still there.
   // (For cleanup path we don't need to bother creating a new dispatcher)