### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
- [X] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success.

### Electron Version

12.0.5

### What operating system are you using?

macOS

### Operating System Version

11.2.3

### What arch are you using?

arm64 (including Apple Silicon)

### Last Known Working Electron version

_No response_

### Expected Behavior

`document.hasFocus()` is only `true` for the window that has focus.

### Actual Behavior

Ever window reports `document.hasFocus()` to be `true` right after opening.

### Testcase Gist URL

https://gist.github.com/16e6fc829febd0cab115dfd0850a31be

### Additional Information

_No response_
shell/browser/api/electron_api_web_contents.h
void StopPainting();
  bool IsPainting() const;
  void SetFrameRate(int frame_rate);
  int GetFrameRate() const;
#endif
  void Invalidate();
  gfx::Size GetSizeForNewRenderView(content::WebContents*) override;
  
  void SetZoomLevel(double level);
  double GetZoomLevel() const;
  void SetZoomFactor(gin_helper::ErrorThrower thrower, double factor);
  double GetZoomFactor() const;
  
  void OnEnterFullscreenModeForTab(
      content::RenderFrameHost* requesting_frame,
      const blink::mojom::FullscreenOptions& options,
      bool allowed);
  
  void OnCreateWindow(const GURL& target_url,
                      const content::Referrer& referrer,
                      const std::string& frame_name,
                      WindowOpenDisposition disposition,
                      const std::string& features,
                      const scoped_refptr<network::ResourceRequestBody>& body);
  
  std::vector<base::FilePath> GetPreloadPaths() const;
  
  v8::Local<v8::Value> GetWebPreferences(v8::Isolate* isolate) const;
  v8::Local<v8::Value> GetLastWebPreferences(v8::Isolate* isolate) const;