When monitor configuration is changing (i.e. a monitor is added or removed) it looks like the driver gets reset and if GetMonitorInfo is called at that time it would return FALSE and MONITORINFO struct would contain garbage.

This means that the code below might return an arbitrary rect.
Please investigate if that might cause any unpredictable issues.

gfx::Rect DesktopWindowTreeHostWin::GetWorkAreaBoundsInScreen() const {
  MONITORINFO monitor_info;
  monitor_info.cbSize = sizeof(monitor_info);
  GetMonitorInfo(MonitorFromWindow(message_handler_->hwnd(),
                                   MONITOR_DEFAULTTONEAREST),
                 &monitor_info);
  gfx::Rect pixel_bounds = gfx::Rect(monitor_info.rcWork);
  return display::win::ScreenWin::ScreenToDIPRect(GetHWND(), pixel_bounds);
}