Revert of Deletes mojo::Callback

components/mus/public/cpp/window_surface.h

 // 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.
 
 #ifndef COMPONENTS_MUS_PUBLIC_CPP_WINDOW_SURFACE_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_WINDOW_SURFACE_H_
 
 #include <memory>
 
-#include "base/callback.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/threading/thread_checker.h"
 #include "components/mus/public/interfaces/compositor_frame.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/bindings/interface_ptr_info.h"
 
 namespace mus {
 
 class WindowSurfaceBinding;
 class WindowSurfaceClient;
 class Window;
 
 // A WindowSurface is wrapper to simplify submitting CompositorFrames to
 // Windows, and receiving ReturnedResources.
 class WindowSurface : public mojom::SurfaceClient {
  public:
   // static
   static std::unique_ptr<WindowSurface> Create(
       std::unique_ptr<WindowSurfaceBinding>* surface_binding);
 
   ~WindowSurface() override;
 
   // Called to indicate that the current thread has assumed control of this
   // object.
   void BindToThread();
 
   void SubmitCompositorFrame(mojom::CompositorFramePtr frame,
-                             const base::Closure& callback);
+                             const mojo::Closure& callback);
 
   void set_client(WindowSurfaceClient* client) { client_ = client; }
 
  private:
   friend class Window;
 
   WindowSurface(mojo::InterfacePtrInfo<mojom::Surface> surface_info,
                 mojo::InterfaceRequest<mojom::SurfaceClient> client_request);
 
   // SurfaceClient implementation:
@@ skipping 26 matching lines @@
 
   mojo::InterfaceRequest<mojom::Surface> surface_request_;
   mojo::InterfacePtrInfo<mojom::SurfaceClient> surface_client_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowSurfaceBinding);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_WINDOW_SURFACE_H_