Revert 109960 - Send WM_DEVICECHANGE message through SystemMonitor

content/browser/system_message_window_win.h

-// Copyright (c) 2011 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 CONTENT_BROWSER_SYSTEM_MESSAGE_WINDOW_WIN_H_
-#define CONTENT_BROWSER_SYSTEM_MESSAGE_WINDOW_WIN_H_
-#pragma once
-
-#include "build/build_config.h"
-
-#include <windows.h>
-
-#include "base/basictypes.h"
-#include "content/common/content_export.h"
-
-class CONTENT_EXPORT SystemMessageWindowWin {
- public:
-  SystemMessageWindowWin();
-  virtual ~SystemMessageWindowWin();
-
-  virtual LRESULT OnDeviceChange(UINT event_type, DWORD data);
-
- private:
-  LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
-                           WPARAM wparam, LPARAM lparam);
-
-  static LRESULT CALLBACK WndProcThunk(HWND hwnd,
-                                       UINT message,
-                                       WPARAM wparam,
-                                       LPARAM lparam) {
-    SystemMessageWindowWin* msg_wnd = reinterpret_cast<SystemMessageWindowWin*>(
-        GetWindowLongPtr(hwnd, GWLP_USERDATA));
-    if (msg_wnd)
-      return msg_wnd->WndProc(hwnd, message, wparam, lparam);
-    return ::DefWindowProc(hwnd, message, wparam, lparam);
-  }
-
-  HWND window_;
-
-  DISALLOW_COPY_AND_ASSIGN(SystemMessageWindowWin);
-};
-
-#endif  // CONTENT_BROWSER_SYSTEM_MESSAGE_WINDOW_WIN_H_