Revert of Deletes mojo::Callback

components/mus/ws/server_window_surface.cc

Index: components/mus/ws/server_window_surface.cc
diff --git a/components/mus/ws/server_window_surface.cc b/components/mus/ws/server_window_surface.cc
index 28d6f4e786a8696ef7d5033681f9908f9a6ce352..97542d53c96b7ad8f824c28a821f0520e87a01f0 100644
--- a/components/mus/ws/server_window_surface.cc
+++ b/components/mus/ws/server_window_surface.cc
@@ -4,7 +4,6 @@
 
 #include "components/mus/ws/server_window_surface.h"
 
-#include "base/callback.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/quads/surface_draw_quad.h"
@@ -18,7 +17,7 @@
 namespace ws {
 namespace {
 
-void CallCallback(const base::Closure& callback, cc::SurfaceDrawStatus status) {
+void CallCallback(const mojo::Closure& callback, cc::SurfaceDrawStatus status) {
   callback.Run();
 }