desktop-shell: Make activate() take a view instead of surface

In preparation for further refactorings.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
diff --git a/desktop-shell/shell.h b/desktop-shell/shell.h
index a5fe194..ae4068c 100644
--- a/desktop-shell/shell.h
+++ b/desktop-shell/shell.h
@@ -235,7 +235,7 @@
 		       struct weston_output *lowering_output);
 
 void
-activate(struct desktop_shell *shell, struct weston_surface *es,
+activate(struct desktop_shell *shell, struct weston_view *view,
 	 struct weston_seat *seat, bool configure);
 
 void