Create an experiment to study whether too many bindings cause NAT failure

chrome/browser/chrome_browser_field_trials_desktop.cc

Index: chrome/browser/chrome_browser_field_trials_desktop.cc
diff --git a/chrome/browser/chrome_browser_field_trials_desktop.cc b/chrome/browser/chrome_browser_field_trials_desktop.cc
index 50bde4d5d5571148a14f1dc63ab8fba2514f4a2d..4e6ac084aab632e7b0130ce43bf34c3b3c3b55a9 100644
--- a/chrome/browser/chrome_browser_field_trials_desktop.cc
+++ b/chrome/browser/chrome_browser_field_trials_desktop.cc
@@ -45,16 +45,18 @@ void SetupLightSpeedTrials() {
 void SetupStunProbeTrial() {
 #if defined(ENABLE_WEBRTC)
   std::map<std::string, std::string> params;
-  if (!variations::GetVariationParams("StunProbeTrial", &params))
+  if (!variations::GetVariationParams("StunProbeTrial2", &params))
     return;
 
   // The parameter, used by StartStunFieldTrial, should have the following
-  // format: "request_per_ip/interval/sharedsocket/server1:port/server2:port/
-  // server3:port/"
+  // format: "request_per_ip/interval/sharedsocket/batch_size/total_batches/
+  // server1:port/server2:port/server3:port/"
   std::string cmd_param = params["request_per_ip"] + "/" + params["interval"] +
                           "/" + params["sharedsocket"] + "/" +
-                          params["server1"] + "/" + params["server2"] + "/" +
-                          params["server3"] + "/";
+                          params["batch_size"] + "/" + params["total_batches"] +
+                          "/" + params["server1"] + "/" + params["server2"] +
+                          "/" + params["server3"] + "/" + params["server4"] +
+                          "/" + params["server5"] + "/" + params["server6"];

[pthatcher2, 2015/10/29 14:13:13]

Why do we need 6 servers?

[guoweis_webrtc, 2015/10/29 21:45:29]

The parsing code will stop at the empty server so this is not an issue. Adding
more servers allow us to config it in finch if we do need that many servers in
the future.

 
   base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
       switches::kWebRtcStunProbeTrialParameter, cmd_param);