Getting rid of SurfaceIdHandler as it is no longer needed.

services/ui/public/cpp/window_private.h

 // Copyright 2014 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 SERVICES_UI_PUBLIC_CPP_WINDOW_PRIVATE_H_
 #define SERVICES_UI_PUBLIC_CPP_WINDOW_PRIVATE_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "base/macros.h"
 #include "mojo/public/cpp/bindings/array.h"
-#include "services/ui/public/cpp/surface_id_handler.h"
 #include "services/ui/public/cpp/window.h"
 
 namespace ui {
 
 // This class is a friend of a Window and contains functions to mutate internal
 // state of Window.
 class WindowPrivate {
  public:
   explicit WindowPrivate(Window* window);
   ~WindowPrivate();
@@ skipping 71 matching lines @@
 
  private:
   Window* window_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowPrivate);
 };
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_PUBLIC_CPP_WINDOW_PRIVATE_H_