Extract initProfiler middleware from map-controller

lib/cartodb/controllers/map.js

@@ -72,7 +72,7 @@ MapController.prototype.composeCreateMapMiddleware = function (useTemplate = fal
         userMiddleware(),
         allowQueryParams(['aggregation']),
         this.prepareContext,
-        this.initProfiler(isTemplateInstantiation),
+        initProfiler(isTemplateInstantiation),
         this.checkJsonContentType(),
         useTemplate ? this.checkInstantiteLayergroup() : this.checkCreateLayergroup(),
         useTemplate ? this.getTemplate() : this.prepareAdapterMapConfig(),
@@ -97,7 +97,7 @@ MapController.prototype.composeCreateMapMiddleware = function (useTemplate = fal
     ];
 };
 
-MapController.prototype.initProfiler = function (isTemplateInstantiation) {
+function initProfiler (isTemplateInstantiation) {
     const operation = isTemplateInstantiation ? 'instance_template' : 'createmap';
 
     return function initProfilerMiddleware (req, res, next) {
@@ -105,7 +105,7 @@ MapController.prototype.initProfiler = function (isTemplateInstantiation) {
         req.profiler.done(`${operation}.initProfilerMiddleware`);
         next();
     };
-};
+}
 
 MapController.prototype.checkJsonContentType = function () {
     return function checkJsonContentTypeMiddleware(req, res, next) {