Unfortunately it looks like you aren't supposed to do that with Google AdSense: https://support.google.com/adsense/answer/3394713

> Is it violating program policy if I place ads on iframe webpages in my software?

> Yes, it does violate our policies. Firstly, you’re not allowed to place ads in a frame within another page. Exceptions to our policies are permitted only with authorization from Google for the valid use of iframes. Secondly, you’re not allowed to put ads in your software, e.g., if you control both a website with ads and an app that loads that website, we will take action against it.