[gtk+] mir: add default GdkSeat for the default GdkDisplay

[William Hua <williamhua src gnome org>]

commit 2b95e4db55cd68f4d1e829d43dd9a5c200e40754
Author: William Hua <william hua canonical com>
Date:   Fri Jan 15 14:09:33 2016 -0500

    mir: add default GdkSeat for the default GdkDisplay

 gdk/mir/gdkmirdevicemanager.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/gdk/mir/gdkmirdevicemanager.c b/gdk/mir/gdkmirdevicemanager.c
index c94f8a3..a4c38a9 100644
--- a/gdk/mir/gdkmirdevicemanager.c
+++ b/gdk/mir/gdkmirdevicemanager.c
@@ -20,6 +20,7 @@
 #include "gdkdevicemanagerprivate.h"
 #include "gdkdisplayprivate.h"
 #include "gdkdeviceprivate.h"
+#include "gdkseatdefaultprivate.h"
 
 #include "gdkmir.h"
 #include "gdkmir-private.h"
@@ -97,13 +98,20 @@ static void
 gdk_mir_device_manager_constructed (GObject *object)
 {
   GdkMirDeviceManager *device_manager = GDK_MIR_DEVICE_MANAGER (object);
+  GdkDisplay *display;
+  GdkSeat *seat;
 
   device_manager->keyboard = _gdk_mir_keyboard_new (GDK_DEVICE_MANAGER (device_manager), "Mir Keyboard");
   device_manager->pointer = _gdk_mir_pointer_new (GDK_DEVICE_MANAGER (device_manager), "Mir Pointer");
   _gdk_device_set_associated_device (device_manager->keyboard, device_manager->pointer);
   _gdk_device_set_associated_device (device_manager->pointer, device_manager->keyboard);
 
-  gdk_device_manager_get_display (GDK_DEVICE_MANAGER (device_manager))->core_pointer = 
device_manager->pointer;
+  display = gdk_device_manager_get_display (GDK_DEVICE_MANAGER (device_manager));
+  display->core_pointer = device_manager->pointer;
+
+  seat = gdk_seat_default_new_for_master_pair (device_manager->pointer, device_manager->keyboard);
+  gdk_display_add_seat (display, seat);
+  g_object_unref (seat);
 
   G_OBJECT_CLASS (gdk_mir_device_manager_parent_class)->constructed (object);
 }