Fixes crash on non HTTPS sites.

app.js

@@ -144,16 +144,10 @@ function connect(jid, password) {
 }
 
 /**
- * HTTPS only:
- * We first ask for audio and video combined stream in order to get permissions and not to ask twice.
- * Then we dispose the stream and continue with separate audio, video streams(required for desktop sharing).
+ * We ask for audio and video combined stream in order to get permissions and
+ * not to ask twice.
  */
 function obtainAudioAndVideoPermissions(callback) {
-    // This makes sense only on https sites otherwise we'll be asked for permissions every time
-    if (location.protocol !== 'https:') {
-        callback();
-        return;
-    }
     // Get AV
     getUserMediaWithConstraints(
         ['audio', 'video'],