[gtk/wip/chergert/fix-macos-fps-calculation] macos: fix fps calculation for frame timings

[Christian Hergert <chergert src gnome org>]

commit 7ae8ed82c9ce2656e0301b1d5161c683695b0c00
Author: Christian Hergert <chergert redhat com>
Date:   Thu Oct 15 21:04:51 2020 -0700

    macos: fix fps calculation for frame timings
    
    We need to mark the timings as complete after adding the
    presentation time so that we have a valid FPS for the overlay
    widget and/or fishbowl demo.

 gdk/macos/gdkmacossurface.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index ec0fb41560..9925407d46 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -713,7 +713,10 @@ _gdk_macos_surface_thaw (GdkMacosSurface *self,
       timings = gdk_frame_clock_get_timings (frame_clock, self->pending_frame_counter);
 
       if (timings != NULL)
-        timings->presentation_time = presentation_time - refresh_interval;
+        {
+          timings->presentation_time = presentation_time - refresh_interval;
+          timings->complete = TRUE;
+        }
 
       self->pending_frame_counter = 0;
     }