Implement updateViaCache flag and no-cache by default for main service worker scripts

content/child/service_worker/web_service_worker_registration_impl.cc

Index: content/child/service_worker/web_service_worker_registration_impl.cc
diff --git a/content/child/service_worker/web_service_worker_registration_impl.cc b/content/child/service_worker/web_service_worker_registration_impl.cc
index 6a6d0a59cb68f13722c1c93f39be978f68567512..4a907c8b63583c12a349e4e64c4fc74d33e9be6b 100644
--- a/content/child/service_worker/web_service_worker_registration_impl.cc
+++ b/content/child/service_worker/web_service_worker_registration_impl.cc
@@ -86,6 +86,11 @@ void WebServiceWorkerRegistrationImpl::SetActive(
     queued_tasks_.push_back(QueuedTask(ACTIVE, service_worker));
 }
 
+void WebServiceWorkerRegistrationImpl::SetRegistrationHandleReference(
+    std::unique_ptr<ServiceWorkerRegistrationHandleReference> handle_ref) {
+  handle_ref_ = std::move(handle_ref);
+}
+
 void WebServiceWorkerRegistrationImpl::OnUpdateFound() {
   if (proxy_)
     proxy_->DispatchUpdateFoundEvent();
@@ -123,6 +128,11 @@ blink::WebURL WebServiceWorkerRegistrationImpl::Scope() const {
   return handle_ref_->scope();
 }
 
+blink::WebServiceWorkerUpdateViaCache
+WebServiceWorkerRegistrationImpl::UpdateViaCache() const {
+  return handle_ref_->update_via_cache();
+}
+
 void WebServiceWorkerRegistrationImpl::Update(
     blink::WebServiceWorkerProvider* provider,
     std::unique_ptr<WebServiceWorkerUpdateCallbacks> callbacks) {