Implemented OAuth2 support for remoting_me2me_host.
Note that this still doesn't allow hosts to be registered using OAuth, as that's
still the domain of the Python script.
BUG=None
TEST=Modify auth.json so that the xmpp_auth_token is your OAuth refresh token (get it from the web-apps local storage) and add the following line: "xmpp_auth_service": "oauth-refresh"
Review URL: http://codereview.chromium.org/
9721008
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@127758 0039d316-1c4b-4281-b951-d872f2087c98