Plumb ConnectionAttempts from HttpNetworkTransaction to URLRequest.

net/url_request/url_request_http_job.cc

Index: net/url_request/url_request_http_job.cc
diff --git a/net/url_request/url_request_http_job.cc b/net/url_request/url_request_http_job.cc
index 114a8bd53cee38aaabb1f4a8e60f15c40d34f68b..675362e0141aaa042c8253cadf504b298cddfee8 100644
--- a/net/url_request/url_request_http_job.cc
+++ b/net/url_request/url_request_http_job.cc
@@ -279,6 +279,13 @@ void URLRequestHttpJob::Kill() {
   URLRequestJob::Kill();
 }
 
+void URLRequestHttpJob::GetConnectionAttempts(ConnectionAttempts* out) const {
+  if (transaction_)
+    transaction_->GetConnectionAttempts(out);
+  else
+    out->clear();
+}
+
 void URLRequestHttpJob::NotifyBeforeSendProxyHeadersCallback(
     const ProxyInfo& proxy_info,
     HttpRequestHeaders* request_headers) {