### 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 SetEmbedder(const WebContents* embedder);
  void SetDevToolsWebContents(const WebContents* devtools);
  v8::Local<v8::Value> GetNativeView(v8::Isolate* isolate) const;
  void IncrementCapturerCount(gin::Arguments* args);
  void DecrementCapturerCount(gin::Arguments* args);
  bool IsBeingCaptured();
  void HandleNewRenderFrame(content::RenderFrameHost* render_frame_host);
#if BUILDFLAG(ENABLE_PRINTING)
  void OnGetDefaultPrinter(base::Value print_settings,
                           printing::CompletionCallback print_callback,
                           std::u16string device_name,
                           bool silent,
                           std::u16string default_printer);
  void Print(gin::Arguments* args);
  
  v8::Local<v8::Promise> PrintToPDF(base::DictionaryValue settings);
#endif
  void SetNextChildWebPreferences(const gin_helper::Dictionary);
  
  void AddWorkSpace(gin::Arguments* args, const base::FilePath& path);
  void RemoveWorkSpace(gin::Arguments* args, const base::FilePath& path);
  
  void Undo();
  void Redo();
  void Cut();
  void Copy();
  void Paste();
  void PasteAndMatchStyle();
  void Delete();
  void SelectAll();