SharePoint 2013 Chrome Control not applying style to SharePoint app

I have include a chrome control to my app using  reference specified in here. But in the first time it didn’t work properly. it just gave a page with out any styles.

But then inspecting errors I found jQuery library not loading correctly using the reference link  

http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js

So I installed the jQuery to my project using nugget manager (you can do it manually as well)  and change the js reference to the project.

so it worked for me.