You need a Google API account
You have to put in the Resources/public/js/authCheck_iframe.js
- the API key
- the client_id
Info on Hangout integration :
- https://hangoutiframer.appspot.com/static/help.html
- Google hangout docs : http://developers.google.com/+/hangouts/getting-started
- https://hangout-experiments.googlecode.com/git-history/6b465eeeb60ab28720ce450ee369ed47d2f36721/iframe/README_iframe.txt For OAuth in iframe
- https://code.google.com/p/hangout-experiments/source/browse/oauth/iframe/hangoutOAuth2iframe.html