The chrome extension guide has a tutorial for the old analytics install: https://developer.chrome.com/extensions/tut_analytics.html
The instructions just say to link
I managed to get Google Analytics up and running using Chrome Platform Analytics (CPA). The only confusing part is how to set up a property in the administration console of GA. I had to create a Mobile Application property, which is not too intuitive.
Also, I created an options page that lets users disable analytics if desired, to comply with the opt-out requirements.
I hope that helps!