[ServiceWorker] Propagates ServiceWorker fetched response's URL and wasFetchedViaServiceWorker flag.

content/child/resource_dispatcher.cc

Index: content/child/resource_dispatcher.cc
diff --git a/content/child/resource_dispatcher.cc b/content/child/resource_dispatcher.cc
index 922681bbbf841dab5c70e8745ddfd8da37885813..40278a51d487eb5e081c3c4734bebce4a5d2a94e 100644
--- a/content/child/resource_dispatcher.cc
+++ b/content/child/resource_dispatcher.cc
@@ -358,6 +358,13 @@ void ResourceDispatcher::OnReceivedResponse(
       request_info->peer = new_peer;
   }
 
+  // Updates the response_url if the response was fetched via a ServiceWorker,
+  // and it was not generated inside the ServiceWorker.
+  if (response_head.was_fetched_via_service_worker &&
+      !response_head.original_url_via_service_worker.is_empty()) {
+    request_info->response_url = response_head.original_url_via_service_worker;

[tyoshino (SeeGerritForStatus), 2014/07/09 07:09:01]

please make sure that one who knows what's expected for response_url agree on
this. I.e. owner of SiteIsolationPolicy?

+  }
+
   ResourceResponseInfo renderer_response_info;
   ToResourceResponseInfo(*request_info, response_head, &renderer_response_info);
   request_info->site_isolation_metadata =