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 736379626fc0e40fa1bf22194f84052fe81aebfb..0485d68df5b2e22900653a100d40c96a7a788698 100644
--- a/content/child/service_worker/web_service_worker_provider_impl.cc
+++ b/content/child/service_worker/web_service_worker_provider_impl.cc
@@ -82,6 +82,10 @@ 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)