[glib/settings-portal: 2/4] settings: Register the keyfile backend as extension

[Matthias Clasen <matthiasc src gnome org>]

commit c100699418de015d4a8e79f8ed0d60c293585a52
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Dec 19 20:03:29 2018 -0500

    settings: Register the keyfile backend as extension
    
    This was not done previously because the backend
    could not be instantiated without parameters.

 gio/gkeyfilesettingsbackend.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/gio/gkeyfilesettingsbackend.c b/gio/gkeyfilesettingsbackend.c
index 0511c1b97..65c2ba855 100644
--- a/gio/gkeyfilesettingsbackend.c
+++ b/gio/gkeyfilesettingsbackend.c
@@ -32,7 +32,7 @@
 #include "gfilemonitor.h"
 #include "gsimplepermission.h"
 #include "gsettingsbackendinternal.h"
-#include "giomodule.h"
+#include "giomodule-priv.h"
 
 
 #define G_TYPE_KEYFILE_SETTINGS_BACKEND      (g_keyfile_settings_backend_get_type ())
@@ -72,9 +72,12 @@ typedef struct
   GFileMonitor      *dir_monitor;
 } GKeyfileSettingsBackend;
 
-G_DEFINE_TYPE (GKeyfileSettingsBackend,
-               g_keyfile_settings_backend,
-               G_TYPE_SETTINGS_BACKEND)
+G_DEFINE_TYPE_WITH_CODE (GKeyfileSettingsBackend,
+                         g_keyfile_settings_backend,
+                         G_TYPE_SETTINGS_BACKEND,
+                         _g_io_modules_ensure_extension_points_registered ();
+                         g_io_extension_point_implement (G_SETTINGS_BACKEND_EXTENSION_POINT_NAME,
+                                                         g_define_type_id, "keyfile", 10))
 
 static void
 compute_checksum (guint8        *digest,