Support for Chrome App OAuth2

[godd9170]

I'm trying to use the chrome.identity api to authenticate within a chrome extension. The only way to use chrome.identity however, is to register a chrome app as opposed to a standard web application like this:

Unfortunately this type of registration doesn't give you a client secret, which appears to be a requirement in the docs here.

VS.

Is it even possible to oauth2 without a client secret?