At first glance it seems that remoting and gaia have a bunch of duplicated code around token fetching/refreshing and perhaps management. It would be nice if we took a look and used the gaia version and removed the remoting version.

Gaia version is found here: https://cs.chromium.org/chromium/src/google_apis/gaia/

Remoting version will be found here: https://cs.chromium.org/chromium/src/remoting/base/