Remove win8/metro_driver

win8/metro_driver/devices_handler.h

-// Copyright (c) 2012 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 CHROME_BROWSER_UI_METRO_DRIVER_DEVICES_HANDLER_H_
-#define CHROME_BROWSER_UI_METRO_DRIVER_DEVICES_HANDLER_H_
-
-#include <windows.ui.core.h>
-
-#include "base/macros.h"
-#include "win8/metro_driver/print_handler.h"
-
-namespace metro_driver {
-
-// This class handles the devices charm.
-class DevicesHandler {
- public:
-  DevicesHandler();
-  ~DevicesHandler();
-
-  HRESULT Initialize(winui::Core::ICoreWindow* window);
-
- private:
-  PrintHandler print_handler_;
-
-  DISALLOW_COPY_AND_ASSIGN(DevicesHandler);
-};
-
-}  // namespace metro_driver
-
-#endif  // CHROME_BROWSER_UI_METRO_DRIVER_DEVICES_HANDLER_H_