feat: Makes the google analytics tracking id configurable.

analytics-ga.js

     /**
      *
      */
-    function Analytics() {
+    function Analytics(options) {
         /* eslint-disable */
 
+        if (!options.googleAnalyticsTrackingId) {
+            console.log(
+                'Failed to initialize Google Analytics handler, no tracking ID');
+             return;
+        }
+
         /**
          * Google Analytics
+         * TODO: Keep this local, there's no need to add it to window.
          */
         (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
             (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
         })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-        ga('create', 'UA-319188-14', 'jit.si');
+        ga('create', options.googleAnalyticsTrackingId, 'jit.si');
         ga('send', 'pageview');
 
         /* eslint-enable */
      * lib-jitsi-meet.
      */
     Analytics.prototype.sendEvent = function(event) {
-        if (!event) {
+        if (!event || !ga) {
             return;
         }
 

config.js

     //      "https://example.com/my-custom-analytics.js"
     // ],
 
+    // The Google Analytics Tracking ID
+    // googleAnalyticsTrackingId = 'your-tracking-id-here-UA-123456-1',
+
     // Information about the jitsi-meet instance we are connecting to, including
     // the user region as seen by the server.
     deploymentInfo: {

react/features/analytics/functions.js

 
     const state = getState();
     const config = state['features/base/config'];
-    const { analyticsScriptUrls, deploymentInfo } = config;
+    const { analyticsScriptUrls, deploymentInfo, googleAnalyticsTrackingId }
+        = config;
     const { group, server, user } = state['features/base/jwt'];
     const handlerConstructorOptions = {
         envType: (deploymentInfo && deploymentInfo.envType) || 'dev',
+        googleAnalyticsTrackingId,
         group,
         product: deploymentInfo && deploymentInfo.product,
         subproduct: deploymentInfo && deploymentInfo.environment,