Pipe the FirstPartyForCookies to WorkerFetchContext for off-main-thread-fetch

content/renderer/service_worker/service_worker_fetch_context_impl.cc

Index: content/renderer/service_worker/service_worker_fetch_context_impl.cc
diff --git a/content/renderer/service_worker/service_worker_fetch_context_impl.cc b/content/renderer/service_worker/service_worker_fetch_context_impl.cc
index 9de7876345657359953366de74363e39a6c755f3..9be60e513b4218025d8b1bb3a8c44c4799d1b6a2 100644
--- a/content/renderer/service_worker/service_worker_fetch_context_impl.cc
+++ b/content/renderer/service_worker/service_worker_fetch_context_impl.cc
@@ -11,9 +11,11 @@
 namespace content {
 
 ServiceWorkerFetchContextImpl::ServiceWorkerFetchContextImpl(
+    const GURL& worker_script_url,
     mojom::WorkerURLLoaderFactoryProviderPtrInfo provider_info,
     int service_worker_provider_id)
-    : provider_info_(std::move(provider_info)),
+    : worker_script_url_(worker_script_url),
+      provider_info_(std::move(provider_info)),
       service_worker_provider_id_(service_worker_provider_id) {}
 
 ServiceWorkerFetchContextImpl::~ServiceWorkerFetchContextImpl() {}
@@ -54,4 +56,12 @@ bool ServiceWorkerFetchContextImpl::IsDataSaverEnabled() const {
   return is_data_saver_enabled_;
 }
 
+blink::WebURL ServiceWorkerFetchContextImpl::FirstPartyForCookies() const {
+  // According to the spec, we can use the |worker_script_url_| for
+  // FirstPartyForCookies, because "site for cookies" for the service worker is
+  // the service worker's origin's host's registrable domain.
+  // https://tools.ietf.org/html/draft-west-first-party-cookies-07#section-2.1.2
+  return worker_script_url_;
+}
+
 }  // namespace content