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 e4665696bdacb4ae5a6d545a5419987eee2836a5..1274499a234f3c2be3b6b3358244a8f822b7632d 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,