* 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
const std::vector<DraggableRegion>& regions) override;
  void ShowWindowButton(NSWindowButton button);
  void InstallView();
  void UninstallView();
  
  
  void UpdateDraggableRegionViews(const std::vector<DraggableRegion>& regions);
  void RegisterInputEventObserver(content::RenderViewHost* host);
  void UnregisterInputEventObserver(content::RenderViewHost* host);
  base::scoped_nsobject<AtomNSWindow> window_;
  base::scoped_nsobject<AtomNSWindowDelegate> window_delegate_;
  
  id wheel_event_monitor_;
  
  base::scoped_nsobject<FullSizeContentView> content_view_;
  NativeBrowserView* browser_view_;
  std::vector<DraggableRegion> draggable_regions_;
  bool is_kiosk_;
  bool was_fullscreen_;
  bool zoom_to_page_width_;
  NSInteger attention_request_id_;  
  
  NSApplicationPresentationOptions kiosk_options_;
  
  TitleBarStyle title_bar_style_;
  DISALLOW_COPY_AND_ASSIGN(NativeWindowMac);
};
}  
#endif