- 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
return;
  if (!menu_bar_) {
    gfx::Size content_size = GetContentSize();
    menu_bar_.reset(new MenuBar(this));
    menu_bar_->set_owned_by_client();
    if (!menu_bar_autohide_) {
      SetMenuBarVisibility(true);
      if (use_content_size_) {
        
        extensions::SizeConstraints constraints = GetContentSizeConstraints();
        if (constraints.HasMinimumSize()) {
          gfx::Size min_size = constraints.GetMinimumSize();
          min_size.set_height(min_size.height() + kMenuBarHeight);
          constraints.set_minimum_size(min_size);
        }
        if (constraints.HasMaximumSize()) {
          gfx::Size max_size = constraints.GetMaximumSize();
          max_size.set_height(max_size.height() + kMenuBarHeight);
          constraints.set_maximum_size(max_size);
        }
        SetContentSizeConstraints(constraints);
        
        SetContentSize(content_size);
      }
    }
  }
  menu_bar_->SetMenu(menu_model);
  Layout();
}
void NativeWindowViews::SetBrowserView(NativeBrowserView* browser_view) {