Revert of Deletes mojo::Callback

components/mus/public/cpp/lib/window_surface.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/mus/public/cpp/window_surface.h"
 
 #include "base/memory/ptr_util.h"
 #include "components/mus/public/cpp/surfaces/surfaces_type_converters.h"
 #include "components/mus/public/cpp/window_surface_client.h"
 
@@ skipping 17 matching lines @@
 
 void WindowSurface::BindToThread() {
   DCHECK(!thread_checker_);
   thread_checker_.reset(new base::ThreadChecker());
   surface_.Bind(std::move(surface_info_));
   client_binding_.reset(new mojo::Binding<mojom::SurfaceClient>(
       this, std::move(client_request_)));
 }
 
 void WindowSurface::SubmitCompositorFrame(mojom::CompositorFramePtr frame,
-                                          const base::Closure& callback) {
+                                          const mojo::Closure& callback) {
   DCHECK(thread_checker_);
   DCHECK(thread_checker_->CalledOnValidThread());
   if (!surface_)
     return;
   surface_->SubmitCompositorFrame(std::move(frame), callback);
 }
 
 WindowSurface::WindowSurface(
     mojo::InterfacePtrInfo<mojom::Surface> surface_info,
     mojo::InterfaceRequest<mojom::SurfaceClient> client_request)
@@ skipping 12 matching lines @@
 
 WindowSurfaceBinding::~WindowSurfaceBinding() {}
 
 WindowSurfaceBinding::WindowSurfaceBinding(
     mojo::InterfaceRequest<mojom::Surface> surface_request,
     mojo::InterfacePtrInfo<mojom::SurfaceClient> surface_client)
     : surface_request_(std::move(surface_request)),
       surface_client_(std::move(surface_client)) {}
 
 }  // namespace mus