Revert 109960 - Send WM_DEVICECHANGE message through SystemMonitor

content/browser/system_message_window_win.cc

-// 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.
-
-#include "content/browser/system_message_window_win.h"
-
-#include <windows.h>
-#include <dbt.h>
-
-#include "base/system_monitor/system_monitor.h"
-#include "base/win/wrapped_window_proc.h"
-
-static const wchar_t* const WindowClassName = L"Chrome_SystemMessageWindow";
-
-SystemMessageWindowWin::SystemMessageWindowWin() {
-  HINSTANCE hinst = GetModuleHandle(NULL);
-
-  WNDCLASSEX wc = {0};
-  wc.cbSize = sizeof(wc);
-  wc.lpfnWndProc =
-      base::win::WrappedWindowProc<&SystemMessageWindowWin::WndProcThunk>;
-  wc.hInstance = hinst;
-  wc.lpszClassName = WindowClassName;
-  ATOM clazz = RegisterClassEx(&wc);
-  DCHECK(clazz);
-
-  window_ = CreateWindow(WindowClassName,
-                         0, 0, 0, 0, 0, 0, 0, 0, hinst, 0);
-  SetWindowLongPtr(window_, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(this));
-}
-
-SystemMessageWindowWin::~SystemMessageWindowWin() {
-  if (window_) {
-    DestroyWindow(window_);
-    UnregisterClass(WindowClassName, GetModuleHandle(NULL));
-  }
-}
-
-LRESULT SystemMessageWindowWin::OnDeviceChange(UINT event_type, DWORD data) {
-  base::SystemMonitor* monitor = base::SystemMonitor::Get();
-  if (monitor && event_type == DBT_DEVNODES_CHANGED)
-    monitor->ProcessDevicesChanged();
-  return TRUE;
-}
-
-LRESULT CALLBACK SystemMessageWindowWin::WndProc(HWND hwnd, UINT message,
-                                                 WPARAM wparam, LPARAM lparam) {
-  switch (message) {
-    case WM_DEVICECHANGE:
-      return OnDeviceChange(static_cast<UINT>(wparam),
-                            static_cast<DWORD>(lparam));
-    default:
-      break;
-  }
-
-  return ::DefWindowProc(hwnd, message, wparam, lparam);
-}