- 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 base::UTF8ToUTF16(title_);
}
bool NativeWindowViews::ShouldHandleSystemCommands() const {
  return true;
}
views::Widget* NativeWindowViews::GetWidget() {
  return window_.get();
}
const views::Widget* NativeWindowViews::GetWidget() const {
  return window_.get();
}
views::View* NativeWindowViews::GetContentsView() {
  return this;
}
bool NativeWindowViews::ShouldDescendIntoChildForEventHandling(
    gfx::NativeView child,
    const gfx::Point& location) {
  
  if (draggable_region() &&
      draggable_region()->contains(location.x(), location.y()))
    return false;
  
  if (!has_frame() && CanResize()) {
    FramelessView* frame = static_cast<FramelessView*>(
        window_->non_client_view()->frame_view());
    return frame->ResizingBorderHitTest(location) == HTNOWHERE;
  }
  return true;
}
views::ClientView* NativeWindowViews::CreateClientView(views::Widget* widget) {