UI: Move Scene Statistics to the 3D Viewport

Removes statistics from footer and to an (optional) overlay in 3DView.

Differential Revision: https://developer.blender.org/D7410

Reviewed by Campbell Barton

source/blender/editors/include/ED_info.h

@@ -31,9 +31,9 @@ struct Main;
 
 /* info_stats.c */
 void ED_info_stats_clear(struct ViewLayer *view_layer);
-const char *ED_info_stats_string(struct Main *bmain,
-                                 struct Scene *scene,
-                                 struct ViewLayer *view_layer);
+const char *ED_info_footer_string(struct ViewLayer *view_layer);
+void ED_info_draw_stats(
+    Main *bmain, Scene *scene, ViewLayer *view_layer, int x, int *y, int height);
 
 #ifdef __cplusplus
 }