Implement dumb URLLoader{Factory} for ServiceWorker script loading

content/renderer/service_worker/service_worker_context_client.cc

Index: content/renderer/service_worker/service_worker_context_client.cc
diff --git a/content/renderer/service_worker/service_worker_context_client.cc b/content/renderer/service_worker/service_worker_context_client.cc
index b8606fb281d7f579e027536fa33a12bf480a478c..84e6ae5e82c2cf77f612b98968247dec6e9dcb38 100644
--- a/content/renderer/service_worker/service_worker_context_client.cc
+++ b/content/renderer/service_worker/service_worker_context_client.cc
@@ -100,6 +100,8 @@ class WebServiceWorkerNetworkProviderImpl
     // Service workers are only available in secure contexts, so all requests
     // are initiated in a secure context.
     extra_data->set_initiated_in_secure_context(true);
+    extra_data->set_url_loader_factory_override(
+        provider_->script_loader_factory());
     request.SetExtraData(extra_data.release());
   }