- 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
static_cast<NativeWindowViews*>(contents_view())->RequestToClosePage();
    return false;
  }
 private:
  DISALLOW_COPY_AND_ASSIGN(NativeWindowClientView);
};
}  
NativeWindowViews::NativeWindowViews(
    brightray::InspectableWebContents* web_contents,
    const mate::Dictionary& options,
    NativeWindow* parent)
    : NativeWindow(web_contents, options, parent),
      window_(new views::Widget),
      web_view_(inspectable_web_contents()->GetView()->GetView()),
      browser_view_(nullptr),
      menu_bar_autohide_(false),
      menu_bar_visible_(false),
      menu_bar_alt_pressed_(false),
#if defined(OS_WIN)
      checked_for_a11y_support_(false),
      thick_frame_(true),
#endif
      keyboard_event_handler_(new views::UnhandledKeyboardEventHandler),
      disable_count_(0),
      use_content_size_(false),
      movable_(true),
      resizable_(true),
      maximizable_(true),
      minimizable_(true),
      fullscreenable_(true) {