Add ongoing events to net-export log when logging starts

ios/chrome/browser/ui/webui/net_export/net_export_ui.cc

Index: ios/chrome/browser/ui/webui/net_export/net_export_ui.cc
diff --git a/ios/chrome/browser/ui/webui/net_export/net_export_ui.cc b/ios/chrome/browser/ui/webui/net_export/net_export_ui.cc
index f58b4bb789fa05baa5d983cede514c9512285deb..c13cf55d23677c3a671877ca9ed7dcb0ea2355cd 100644
--- a/ios/chrome/browser/ui/webui/net_export/net_export_ui.cc
+++ b/ios/chrome/browser/ui/webui/net_export/net_export_ui.cc
@@ -139,7 +139,9 @@ void NetExportMessageHandler::OnStartNetLog(const base::ListValue* list) {
 
   net::NetLogCaptureMode capture_mode =
       net_log::NetLogFileWriter::CaptureModeFromString(capture_mode_string);
-  file_writer_->StartNetLog(base::FilePath(), capture_mode);
+  file_writer_->StartNetLog(
+      base::FilePath(), capture_mode,
+      {GetApplicationContext()->GetSystemURLRequestContext()});
 }
 
 void NetExportMessageHandler::OnStopNetLog(const base::ListValue* list) {