Keep workerStart timing info over request job restarts

content/browser/service_worker/service_worker_url_request_job.h

Index: content/browser/service_worker/service_worker_url_request_job.h
diff --git a/content/browser/service_worker/service_worker_url_request_job.h b/content/browser/service_worker/service_worker_url_request_job.h
index b8dc6d8d7e351b4f3e8ade1e8f4a8f10a5ec9646..96e500728e4d55971d6d810827ca0fd6349ce320 100644
--- a/content/browser/service_worker/service_worker_url_request_job.h
+++ b/content/browser/service_worker/service_worker_url_request_job.h
@@ -116,6 +116,10 @@ class CONTENT_EXPORT ServiceWorkerURLRequestJob
       blink::WebServiceWorkerResponseType* response_type_via_service_worker,
       base::TimeTicks* worker_start_time) const;
 
+  const base::TimeTicks& worker_start_time() const {
+    return worker_start_time_;
+  }
+
  protected:
   ~ServiceWorkerURLRequestJob() override;