Added flags to override hosts for LSO URLs.

google_apis/gaia/gaia_urls.h

Index: google_apis/gaia/gaia_urls.h
diff --git a/google_apis/gaia/gaia_urls.h b/google_apis/gaia/gaia_urls.h
index cf7b87c45c1b5397d705b0e3f661192d62631390..cd63d1d55df3c51555bb680e2fef9c3d97ba09b1 100644
--- a/google_apis/gaia/gaia_urls.h
+++ b/google_apis/gaia/gaia_urls.h
@@ -52,6 +52,8 @@ class GaiaUrls {
   std::string captcha_url_prefix_;
 
   std::string gaia_origin_url_;
+  std::string lso_origin_url_;
+  std::string google_apis_origin_url_;
   std::string client_login_url_;
   std::string service_login_url_;
   std::string issue_auth_token_url_;