wayland: Scale window geometry rects given the main output

Since we scale surface actors given what main output their toplevel
window is on, also scale the window geometry coordinates and sizes
(window->rect size and window->custom_frame_extents.top/left) in order
to make the window geometry represent what is being rendered on the
stage.

https://bugzilla.gnome.org/show_bug.cgi?id=744934

src/wayland/meta-wayland-surface.c

@@ -2137,12 +2137,6 @@ meta_wayland_surface_configure_notify (MetaWaylandSurface *surface,
       wl_array_init (&states);
       fill_states (&states, surface->window);
 
-      /* new_width and new_height comes from window->rect, which is based on
-       * the buffer size, not the surface size. The configure event requires
-       * surface size. */
-      new_width /= surface->scale;
-      new_height /= surface->scale;
-
       xdg_surface_send_configure (surface->xdg_surface, new_width, new_height, &states, serial);
 
       wl_array_release (&states);