- 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/ui/views/win_frame_view.cc
#include "atom/browser/ui/views/win_frame_view.h"
#include "atom/browser/native_window_views.h"
#include "ui/views/widget/widget.h"
#include "ui/views/win/hwnd_util.h"
namespace atom {
namespace {
const char kViewClassName[] = "WinFrameView";
}  
WinFrameView::WinFrameView() {
}
WinFrameView::~WinFrameView() {
}
gfx::Rect WinFrameView::GetWindowBoundsForClientBounds(
    const gfx::Rect& client_bounds) const {
  return views::GetWindowBoundsForClientBounds(
      static_cast<views::View*>(const_cast<WinFrameView*>(this)),
      client_bounds);
}
int WinFrameView::NonClientHitTest(const gfx::Point& point) {
  if (window_->has_frame())
    return frame_->client_view()->NonClientHitTest(point);
  else
    return FramelessView::NonClientHitTest(point);
}
const char* WinFrameView::GetClassName() const {
  return kViewClassName;
}
}