Add urls option to ol.source.GeoJSON

src/objectliterals.jsdoc

@@ -525,6 +525,7 @@
  * @property {ol.proj.ProjectionLike} reprojectTo Re-project to.
  * @property {string|undefined} text Text.
  * @property {string|undefined} url URL.
+ * @property {Array.<string>|undefined} urls URLs.
  */
 
 /**

src/ol/source/geojsonsource.js

@@ -25,7 +25,8 @@ ol.source.GeoJSON = function(opt_options) {
     projection: options.projection,
     reprojectTo: options.reprojectTo,
     text: options.text,
-    url: options.url
+    url: options.url,
+    urls: options.urls
   });
 
 };