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

content/renderer/service_worker/service_worker_fetch_context_impl.cc

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/service_worker/service_worker_fetch_context_impl.h"
 
 #include "content/child/request_extra_data.h"
 #include "content/child/resource_dispatcher.h"
 #include "content/child/web_url_loader_impl.h"
 
 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() {}
 
 void ServiceWorkerFetchContextImpl::InitializeOnWorkerThread(
     base::SingleThreadTaskRunner* loading_task_runner) {
   DCHECK(provider_info_.is_valid());
   resource_dispatcher_ =
       base::MakeUnique<ResourceDispatcher>(nullptr, loading_task_runner);
   provider_.Bind(std::move(provider_info_));
@@ skipping 20 matching lines @@
 }
 
 void ServiceWorkerFetchContextImpl::SetDataSaverEnabled(bool enabled) {
   is_data_saver_enabled_ = enabled;
 }
 
 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