- Electron version: `0.37.4`
- Operating system: Windows

When I maximize my [frameless](https://github.com/electron/electron/blob/master/docs/api/frameless-window.md) electron window a small part of the window in an unmaximized state is visible on a secondary monitor.

**Screenshot**
![electronbug](https://cloud.githubusercontent.com/assets/6634592/14762341/8849c728-09bb-11e6-85d8-de12db3fee2d.PNG)

You can visibly see the "line between the monitors" and you can see some really strange overhanging content that is over that line.

**Steps to reproduce**  
1. Open an electron app
2. Maximize the app on your secondary display
3. Look closely for the overflow onto your primary display

This might take a few times to trigger, it appears to do it about 70% of the time :confused: 

atom/browser/native_window_views.cc
const std::string& description) {
#if defined(OS_WIN)
  taskbar_host_.SetOverlayIcon(GetAcceleratedWidget(), overlay, description);
#endif
}
void NativeWindowViews::SetAutoHideMenuBar(bool auto_hide) {
  menu_bar_autohide_ = auto_hide;
}
bool NativeWindowViews::IsMenuBarAutoHide() {
  return menu_bar_autohide_;
}
void NativeWindowViews::SetMenuBarVisibility(bool visible) {
  if (!menu_bar_ || menu_bar_visible_ == visible)
    return;
  
  if (menu_bar_autohide_)
    menu_bar_->SetAcceleratorVisibility(visible);
  menu_bar_visible_ = visible;
  if (visible) {
    DCHECK_EQ(child_count(), 1);
    AddChildView(menu_bar_.get());
  } else {
    DCHECK_EQ(child_count(), 2);
    RemoveChildView(menu_bar_.get());
  }
  Layout();
}
bool NativeWindowViews::IsMenuBarVisible() {