I am getting the following in chrome:ReferenceError: Extent is not definedDo I need to require anything at the top?require(["dojo/ready",
"dojo/on", "esri/map",
"esri/InfoTemplate",
"esri/layers/ArcGISDynamicMapServiceLayer",
"esri/symbols/SimpleFillSymbol",
"esri/symbols/SimpleLineSymbol",
"esri/tasks/IdentifyTask",
"esri/tasks/IdentifyParameters",
"esri/dijit/Popup",
"dojo/_base/array",
"esri/Color",
"dojo/dom-construct",
"esri/tasks/QueryTask",
"esri/tasks/query", "esri/urlUtils",
"esri/dijit/BasemapToggle", "esri/symbols/SimpleMarkerSymbol", "dojo/domReady!", "esri/Credential",
"esri/config"
],
function(ready, on, Map, InfoTemplate, ArcGISDynamicMapServiceLayer, SimpleFillSymbol, SimpleLineSymbol, IdentifyTask, IdentifyParameters,
Popup, arrayUtils, Color, domConstruct, QueryTask, Query, urlUtils, BasemapToggle, SimpleMarkerSymbol)