Track network stack error codes from UMA and UKM

ios/chrome/browser/metrics/ios_chrome_metrics_service_client.mm

Index: ios/chrome/browser/metrics/ios_chrome_metrics_service_client.mm
diff --git a/ios/chrome/browser/metrics/ios_chrome_metrics_service_client.mm b/ios/chrome/browser/metrics/ios_chrome_metrics_service_client.mm
index da8277d138b63dc7c9735adc11f00695e10351bb..e3b2aaf6aa7dcf67ec78526c3f1ee9d740a2aeb7 100644
--- a/ios/chrome/browser/metrics/ios_chrome_metrics_service_client.mm
+++ b/ios/chrome/browser/metrics/ios_chrome_metrics_service_client.mm
@@ -166,7 +166,7 @@ IOSChromeMetricsServiceClient::CreateUploader(
     base::StringPiece server_url,
     base::StringPiece mime_type,
     metrics::MetricsLogUploader::MetricServiceType service_type,
-    const base::Callback<void(int)>& on_upload_complete) {
+    const metrics::MetricsLogUploader::UploadCallback& on_upload_complete) {
   return base::MakeUnique<metrics::NetMetricsLogUploader>(
       GetApplicationContext()->GetSystemURLRequestContext(), server_url,
       mime_type, service_type, on_upload_complete);