[gtk/wip/chergert/quartz4u: 739/782] macos: simplify root coords calculation

[Christian Hergert <chergert src gnome org>]

commit 4afe1b53578a36f83cd491a410f95e04d4ec8466
Author: Christian Hergert <chergert redhat com>
Date:   Tue May 19 17:00:05 2020 -0700

    macos: simplify root coords calculation
    
    We already store the window position in root coords, so no need to
    waste effort on translations.

 gdk/macos/gdkmacossurface.c | 29 ++---------------------------
 1 file changed, 2 insertions(+), 27 deletions(-)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index cad4275800..f47c55c962 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -193,39 +193,14 @@ gdk_macos_surface_get_root_coords (GdkSurface *surface,
                                    int        *root_y)
 {
   GdkMacosSurface *self = (GdkMacosSurface *)surface;
-  GdkDisplay *display;
-  NSRect content_rect;
-  int tmp_x = 0;
-  int tmp_y = 0;
 
   g_assert (GDK_IS_MACOS_SURFACE (self));
 
-  if (GDK_SURFACE_DESTROYED (surface))
-    {
-      if (root_x)
-        *root_x = 0;
-      if (root_y)
-        *root_y = 0;
-
-      return;
-    }
-
-  content_rect = [self->window contentRectForFrameRect:[self->window frame]];
-
-  display = gdk_surface_get_display (surface);
-  _gdk_macos_display_from_display_coords (GDK_MACOS_DISPLAY (display),
-                                          content_rect.origin.x,
-                                          content_rect.origin.y + content_rect.size.height,
-                                          &tmp_x, &tmp_y);
-
-  tmp_x += x;
-  tmp_y += y;
-
   if (root_x)
-    *root_x = tmp_x;
+    *root_x = surface->x + x;
 
   if (root_y)
-    *root_y = tmp_y;
+    *root_y = surface->y + y;
 }
 
 static gboolean