Bug 821879 - don't initialize Telemetry if we can't send any data in; r=vdjeric

toolkit/components/telemetry/TelemetryPing.js

@@ -717,6 +717,15 @@ TelemetryPing.prototype = {
    * Initializes telemetry within a timer. If there is no PREF_SERVER set, don't turn on telemetry.
    */
   setup: function setup() {
+#ifdef MOZILLA_OFFICIAL
+    if (!Telemetry.canSend) {
+      // We can't send data; no point in initializing observers etc.
+      // Only do this for official builds so that e.g. developer builds
+      // still enable Telemetry based on prefs.
+      Telemetry.canRecord = false;
+      return;
+    }
+#endif
     let enabled = false; 
     try {
       enabled = Services.prefs.getBoolPref(PREF_ENABLED);