* Electron version:1.4.14
* Operating system: mac v10.12.3

### Expected behavior

setting  BrowserWindow options frame false

browser Top frame zone 

There is an invisible window

<!-- What do you think should happen? -->

i want work css cursor:pointer

my option code

	mainWindow = new BrowserWindow({
            show: false,
            frame: false,// look
            title: "",
            useContentSize: false,
            width: mainWindowWidth,
            minWidth: mainWindowWidth,
            height: mainWindowHeight,
            minHeight: mainWindowHeight,
            maximizable:false,
            fullscreenable:false,
            icon: iconPath
        });


atom/browser/native_window_mac.h
void SetResizable(bool resizable) override;
  bool IsResizable() override;
  void SetMovable(bool movable) override;
  void SetAspectRatio(double aspect_ratio, const gfx::Size& extra_size)
    override;
  void PreviewFile(const std::string& path, const std::string& display_name)
    override;
  void CloseFilePreview() override;
  bool IsMovable() override;
  void SetMinimizable(bool minimizable) override;
  bool IsMinimizable() override;
  void SetMaximizable(bool maximizable) override;
  bool IsMaximizable() override;
  void SetFullScreenable(bool fullscreenable) override;
  bool IsFullScreenable() override;
  void SetClosable(bool closable) override;
  bool IsClosable() override;
  void SetAlwaysOnTop(bool top, const std::string& level,
                      int relativeLevel, std::string* error) override;
  bool IsAlwaysOnTop() override;
  void Center() override;
  void Invalidate() override;
  void SetTitle(const std::string& title) override;
  std::string GetTitle() override;
  void FlashFrame(bool flash) override;
  void SetSkipTaskbar(bool skip) override;
  void SetKiosk(bool kiosk) override;
  bool IsKiosk() override;
  void SetBackgroundColor(const std::string& color_name) override;
  void SetHasShadow(bool has_shadow) override;