[gnome-photos] error-box: Use G_DECLARE_FINAL_TYPE

[Debarshi Ray <debarshir src gnome org>]

commit 37cc216c5660d49980a4d50851ff436bdf32e3ef
Author: Shivam Tripathi <shivam flash gmail com>
Date:   Sat Aug 27 12:47:46 2016 +0530

    error-box: Use G_DECLARE_FINAL_TYPE
    
    https://bugzilla.gnome.org/show_bug.cgi?id=763712

 src/photos-error-box.c |    5 -----
 src/photos-error-box.h |   14 +-------------
 2 files changed, 1 insertions(+), 18 deletions(-)
---
diff --git a/src/photos-error-box.c b/src/photos-error-box.c
index a61d5ef..62178d1 100644
--- a/src/photos-error-box.c
+++ b/src/photos-error-box.c
@@ -38,11 +38,6 @@ struct _PhotosErrorBox
   GtkWidget *secondary_label;
 };
 
-struct _PhotosErrorBoxClass
-{
-  GtkGridClass parent_class;
-};
-
 
 G_DEFINE_TYPE (PhotosErrorBox, photos_error_box, GTK_TYPE_GRID);
 
diff --git a/src/photos-error-box.h b/src/photos-error-box.h
index a72bb6d..fa68c23 100644
--- a/src/photos-error-box.h
+++ b/src/photos-error-box.h
@@ -30,19 +30,7 @@
 G_BEGIN_DECLS
 
 #define PHOTOS_TYPE_ERROR_BOX (photos_error_box_get_type ())
-
-#define PHOTOS_ERROR_BOX(obj) \
-  (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
-   PHOTOS_TYPE_ERROR_BOX, PhotosErrorBox))
-
-#define PHOTOS_IS_ERROR_BOX(obj) \
-  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
-   PHOTOS_TYPE_ERROR_BOX))
-
-typedef struct _PhotosErrorBox      PhotosErrorBox;
-typedef struct _PhotosErrorBoxClass PhotosErrorBoxClass;
-
-GType                  photos_error_box_get_type               (void) G_GNUC_CONST;
+G_DECLARE_FINAL_TYPE (PhotosErrorBox, photos_error_box, PHOTOS, ERROR_BOX, GtkGrid)
 
 GtkWidget             *photos_error_box_new                    (void);