[mutter] clutter/frame-clock: Add refresh rate getter

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit feb8bfa0bf23310417e37ef87e87dd30e8d92ad3
Author: Jonas Ådahl <jadahl gmail com>
Date:   Tue Jun 2 11:27:39 2020 +0200

    clutter/frame-clock: Add refresh rate getter
    
    This gets the refresh rate of the frame clock. To be used by tests.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1285

 clutter/clutter/clutter-frame-clock.c | 6 ++++++
 clutter/clutter/clutter-frame-clock.h | 3 +++
 2 files changed, 9 insertions(+)
---
diff --git a/clutter/clutter/clutter-frame-clock.c b/clutter/clutter/clutter-frame-clock.c
index 1ea524aca7..3ff7ca551c 100644
--- a/clutter/clutter/clutter-frame-clock.c
+++ b/clutter/clutter/clutter-frame-clock.c
@@ -77,6 +77,12 @@ struct _ClutterFrameClock
 G_DEFINE_TYPE (ClutterFrameClock, clutter_frame_clock,
                G_TYPE_OBJECT)
 
+float
+clutter_frame_clock_get_refresh_rate (ClutterFrameClock *frame_clock)
+{
+  return frame_clock->refresh_rate;
+}
+
 void
 clutter_frame_clock_add_timeline (ClutterFrameClock *frame_clock,
                                   ClutterTimeline   *timeline)
diff --git a/clutter/clutter/clutter-frame-clock.h b/clutter/clutter/clutter-frame-clock.h
index 20ed79fb28..60eb41ea75 100644
--- a/clutter/clutter/clutter-frame-clock.h
+++ b/clutter/clutter/clutter-frame-clock.h
@@ -78,4 +78,7 @@ void clutter_frame_clock_add_timeline (ClutterFrameClock *frame_clock,
 void clutter_frame_clock_remove_timeline (ClutterFrameClock *frame_clock,
                                           ClutterTimeline   *timeline);
 
+CLUTTER_EXPORT
+float clutter_frame_clock_get_refresh_rate (ClutterFrameClock *frame_clock);
+
 #endif /* CLUTTER_FRAME_CLOCK_H */