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

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index ed7e6ef06b3d57db44d6d7d3a816abb4504cfee9..9f1f2096c9bf84d0df58406f653010807058919e 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3035,6 +3035,8 @@ RenderFrameImpl::CreateWorkerFetchContext() {
       base::MakeUnique<WorkerFetchContextImpl>(
           worker_url_loader_factory_provider.PassInterface());
   worker_fetch_context->set_parent_frame_id(routing_id_);
+  worker_fetch_context->set_first_party_for_cookies(
+      frame_->GetDocument().FirstPartyForCookies());
   blink::WebServiceWorkerNetworkProvider* web_provider =
       frame_->DataSource()->GetServiceWorkerNetworkProvider();
   if (web_provider) {