- 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
NotifyWindowMove();
}
gfx::Rect NativeWindowViews::ContentBoundsToWindowBounds(
    const gfx::Rect& bounds) {
  if (!has_frame())
    return bounds;
  gfx::Rect window_bounds(bounds);
#if defined(OS_WIN)
  HWND hwnd = GetAcceleratedWidget();
  gfx::Rect dpi_bounds = display::win::ScreenWin::DIPToScreenRect(hwnd, bounds);
  window_bounds = display::win::ScreenWin::ScreenToDIPRect(
      hwnd,
      window_->non_client_view()->GetWindowBoundsForClientBounds(dpi_bounds));
#endif
  if (menu_bar_ && menu_bar_visible_) {
    window_bounds.set_y(window_bounds.y() - kMenuBarHeight);
    window_bounds.set_height(window_bounds.height() + kMenuBarHeight);
  }
  return window_bounds;
}
gfx::Rect NativeWindowViews::WindowBoundsToContentBounds(