The new Google login sequence uses two html pages: one for user email
the other for password.

The older sequence used only one page for both user email and
user password.

Change-Id: If875ba3ec9680d7e8c700a269873e427ac037a8e
Reviewed-on: https://gerrit.libreoffice.org/24513Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: David Tardon <dtardon@redhat.com>