Issue #1565792 by hadim, joelpittet: Fixed MarkerClusterer is not working.

js/markerclusterer_marker.js

@@ -7,8 +7,8 @@
 /*global Drupal, GMarker, MarkerClusterer */
 
 // Replace to override marker creation
-Drupal.gmap.factory.marker = function (loc, opts) {
-    return new GMarker(loc, opts);
+Drupal.gmap.factory.marker = function (opts) {
+    return new google.maps.Marker(opts);
 };
 
 Drupal.gmap.addHandler('gmap', function (elem) {
@@ -16,7 +16,10 @@ Drupal.gmap.addHandler('gmap', function (elem) {
 
     obj.bind('init', function () {
         // Set up the markermanager.
-        obj.mc = new MarkerClusterer(obj.map, [], Drupal.settings.gmap_markermanager);
+        obj.mc = new MarkerClusterer(obj.map, [], {
+          maxZoom: parseInt(Drupal.settings.gmap_markermanager["maxZoom"]),
+          gridSize: parseInt(Drupal.settings.gmap_markermanager["gridSize"])
+        });
     });
     obj.bind('addmarker', function (marker) {
         // @@@ Would be really nice to have bulk adding support in gmap.