Guard against undefined average in stats display.

remoting/webapp/base/js/connection_stats.js

Index: remoting/webapp/base/js/connection_stats.js
diff --git a/remoting/webapp/base/js/connection_stats.js b/remoting/webapp/base/js/connection_stats.js
index 61d5680c6d2748bb3c9d06e1254b438df4396a52..9d163663d380abf25cc7614c82c3fc498417d96e 100644
--- a/remoting/webapp/base/js/connection_stats.js
+++ b/remoting/webapp/base/js/connection_stats.js
@@ -141,7 +141,8 @@ remoting.ConnectionStats.prototype.update = function(stats) {
    * @return {string} "type: avg, max; " e.g. "RTT: 8.0, 13; "
    */
   function formatStat(type, avg, max) {
-    return type + ': ' + avg.toFixed(1) + ', ' + max + '; ';
+    var avgStr = (avg == undefined) ? 'n/a' : avg.toFixed(1);
+    return type + ': ' + avgStr + ', ' + max + '; ';
   }
 
   var statistics = document.getElementById('statistics');