Fixes unhandled error from history.pushState

app.js

 
 import UIEvents from './service/UI/UIEvents';
 
+/**
+ * Tries to push history state with the following parameters:
+ * 'VideoChat', `Room: ${roomName}`, URL. If fail, prints the error and returns
+ * it.
+ */
+function pushHistoryState(roomName, URL) {
+    try {
+        window.history.pushState(
+            'VideoChat', `Room: ${roomName}`, URL
+        );
+    } catch (e) {
+        console.warn("Push history state failed with parameters:",
+            'VideoChat', `Room: ${roomName}`, URL, e);
+        return e;
+    }
+    return null;
+}
+
 /**
  * Builds and returns the room name.
  */
     if(!roomName) {
         let word = RoomnameGenerator.generateRoomWithoutSeparator();
         roomName = word.toLowerCase();
-        window.history.pushState(
-            'VideoChat', `Room: ${word}`, window.location.pathname + word
-        );
+        let historyURL = window.location.pathname + word;
+        //Trying to push state with URL "/" + roomName
+        var err = pushHistoryState(word, historyURL);
+        //If URL "/" + roomName is not good, trying with explicitly adding the
+        //domain name.
+        if(err && config.hosts.domain) {
+            pushHistoryState(word, "//" + config.hosts.domain + historyURL);
+        }
     }
 
     return roomName;