Collect stats to investigate the viability of UDP

chrome/browser/metrics/metrics_service.h

Index: chrome/browser/metrics/metrics_service.h
===================================================================
--- chrome/browser/metrics/metrics_service.h	(revision 86778)
+++ chrome/browser/metrics/metrics_service.h	(working copy)
@@ -360,6 +360,9 @@
   // The URL for the metrics server.
   std::wstring server_url_;
 
+  // The TCP/UDP echo server to collect network connectivity stats.
+  std::string network_stats_server_;
+
   // The identifier that's sent to the server with the log reports.
   std::string client_id_;