[gtk+/gtk-style-context: 347/490] GtkThemingEngine: Document missing class vmethods.

[Carlos Garnacho <carlosg src gnome org>]

commit d366c3109561136f077d5fc38700f34f3322e2f7
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Nov 9 21:48:49 2010 +0100

    GtkThemingEngine: Document missing class vmethods.

 gtk/gtkthemingengine.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkthemingengine.h b/gtk/gtkthemingengine.h
index bc830b3..3b45fb0 100644
--- a/gtk/gtkthemingengine.h
+++ b/gtk/gtkthemingengine.h
@@ -62,6 +62,9 @@ struct _GtkThemingEngine
  * @render_layout: Renders a #PangoLayout
  * @render_slider: Renders a slider control, as in #GtkScale.
  * @render_handle: Renders a handle to drag UI elements, as in #GtkPaned.
+ * @render_activity: Renders an area displaying activity, such as in #GtkSpinner,
+ *                   or #GtkProgressBar.
+ * @render_icon_pixbuf: Renders an icon as a #GdkPixbuf.
  *
  * Base class for theming engines.
  */