title: Stripe Checkout does not work on WebView
body: <p>I'm trying to use <a href="https://stripe.com/docs/checkout/tutorial" rel="nofollow">Stripe Checkout</a> inside a WebView (both in Android and in iOS).
  If I run the demo checkout in this <a href="https://stripe.com/docs/checkout/tutorial" rel="nofollow">page</a> from <code>Google Chrome</code> from mobile it opens a new web page and everything works fine.</p>
  
  <p>When I try to run the demo from a WebView (which I expect to behave in a completely similar way) it does not work and gives me a</p>
  
  <pre><code>Sorry, there was a problem loading Checkout.
  If this persists, please try a different browser.
  </code></pre>
  
  <p>I thought that it is not made for mobile, but this is not true because from Google Chrome works perfectly fine.
  Any suggestions to make it work?</p>