CDN Call back for Google Visulization api using Bundle config

Hi All,
       I'm Working on Google Charts for that we are using Google Visualization api. it is working fine as of now when I am adding that CDN to Bundle config and Call back to the local visualization api. for that i added following code in my Bundle config

bundles.UseCdn = true;
bundles.Add(new ScriptBundle("~/Content/cdn", "https://www.google.com/jsapi").Include("~/Contente/SISReports/JS/jsapi.js"));

But it is not loading from the CDN. It is work fine when im giving like this in aspx page.

<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script>
window.google|| document.write('<script type="text/javascript" src="~/Contente/SISReports/JS/jsapi.js"></script>')
</script>
<pre lang="text">
Suggest me the proper way to load the js from CDN