* Electron version: 1.4.14
* Operating system: Windows 8.1

### Expected behavior

A fullscreen transparent window should be transparent.

### Actual behavior

The window is not transparent (has a white background).

### How to reproduce

```
electron.app.on("ready", function () {
    var win = new BrowserWindow({
        show: true,
        frame: false,
        fullscreen: true,
        transparent: true
    });
});
```

Refs https://github.com/electron/electron/issues/8321#issuecomment-273615701


atom/browser/native_window_views.cc
window_->CloseNow();
}
void NativeWindowViews::Focus(bool focus) {
  
  if (!IsVisible())
    return;
  if (focus) {
#if defined(OS_WIN)
    window_->Activate();
#elif defined(USE_X11)
    
    ::Window window = GetAcceleratedWidget();
    XDisplay* xdisplay = gfx::GetXDisplay();
    SendClientEvent(xdisplay, window, "_NET_ACTIVE_WINDOW");
    XMapRaised(xdisplay, window);
#endif
  } else {
    window_->Deactivate();
  }
}
bool NativeWindowViews::IsFocused() {
  return window_->IsActive();
}
void NativeWindowViews::Show() {