Plumb ConnectionAttempts from HttpNetworkTransaction to URLRequest.

net/url_request/url_request_job.cc

Index: net/url_request/url_request_job.cc
diff --git a/net/url_request/url_request_job.cc b/net/url_request/url_request_job.cc
index 5b14b6b28fd19ee69f2ab020a9d996fb2703c193..30acbd81a3ba48bf2a6cd8e94d89f45ef8bc595d 100644
--- a/net/url_request/url_request_job.cc
+++ b/net/url_request/url_request_job.cc
@@ -273,6 +273,10 @@ void URLRequestJob::OnSuspend() {
 void URLRequestJob::NotifyURLRequestDestroyed() {
 }
 
+void URLRequestJob::GetConnectionAttempts(ConnectionAttempts* out) const {
+  out->clear();
+}
+
 // static
 GURL URLRequestJob::ComputeReferrerForRedirect(
     URLRequest::ReferrerPolicy policy,