Update latitude sample.
Update latitude sample.

Reviewed in https://codereview.appspot.com/9329046/.

google/oauth2client,google/oauth2client,clancychilds/oauth2client,googleapis/oauth2client,googleapis/oauth2client,clancychilds/oauth2client,jonparrott/oauth2client,googleapis/google-api-python-client,googleapis/google-api-python-client,jonparrott/oauth2client