[gdm] session: add session pid getter

[Ray Strode <halfline src gnome org>]

commit 01920832ac257feb634cb8bbc5ee3b6e29e545b0
Author: Ray Strode <rstrode redhat com>
Date:   Mon Feb 16 17:12:24 2015 -0500

    session: add session pid getter
    
    We're going to move wtmp recording to GdmManager,
    and for that we'll need the pid of the session.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=744764

 daemon/gdm-session.c |    6 ++++++
 daemon/gdm-session.h |    1 +
 2 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/daemon/gdm-session.c b/daemon/gdm-session.c
index 55f6709..3a125a9 100644
--- a/daemon/gdm-session.c
+++ b/daemon/gdm-session.c
@@ -3603,3 +3603,9 @@ gdm_session_display_mode_to_string (GdmSessionDisplayMode mode)
         g_warning ("Unknown GdmSessionDisplayMode %d", mode);
         return "";
 }
+
+GPid
+gdm_session_get_pid (GdmSession *session)
+{
+        return session->priv->session_pid;
+}
diff --git a/daemon/gdm-session.h b/daemon/gdm-session.h
index 86862b4..c339f3f 100644
--- a/daemon/gdm-session.h
+++ b/daemon/gdm-session.h
@@ -182,6 +182,7 @@ void              gdm_session_set_timed_login_details     (GdmSession *session,
                                                            int         delay);
 gboolean          gdm_session_client_is_connected         (GdmSession *session);
 gboolean          gdm_session_is_running                  (GdmSession *session);
+GPid              gdm_session_get_pid                     (GdmSession *session);
 
 G_END_DECLS