Allow tileLoadFunction override for ol.source.OSM

src/objectliterals.jsdoc

@@ -506,6 +506,8 @@
  * @property {ol.Attribution|undefined} attribution Attribution.
  * @property {Array.<ol.Attribution>|undefined} attributions Attributions.
  * @property {number|undefined} maxZoom Max zoom.
+ * @property {ol.TileLoadFunctionType|undefined} tileLoadFunction Optional
+ *     function to load a tile given a URL.
  * @property {string|undefined} url URL.
  */
 

src/ol/source/osmsource.js

@@ -31,6 +31,7 @@ ol.source.OSM = function(opt_options) {
     crossOrigin: 'anonymous',
     opaque: true,
     maxZoom: options.maxZoom,
+    tileLoadFunction: options.tileLoadFunction,
     url: url
   });