XMLHttpRequest is not defined, in a chrome extension options page

Question

I'm trying to make an XMLHttpRequest in the options page of an extension. In my options.js file I simply have the following code :

if (window.XMLHttpRequest){
        var xhr = new getXMLHttpRequest();
}

But I have this error in the console

Uncaught ReferenceError: getXMLHttpRequest is not defined

I saw here that getXMLHttpRequests are a problem for hosted apps, but in this case, it's a simple extension, so I don't understand.

Solution

To construct an XHR object you use new XMLHttpRequest();.

getXMLHttpRequest is not a standard function.

I saw here that getXMLHttpRequests are a problem…

The question at the other end of the link doesn't use a function with a name starting with get.