### 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/native_window.h
void NotifyWindowWillResize(const gfx::Rect& new_bounds,
                              bool* prevent_default);
  void NotifyWindowResize();
  void NotifyWindowResized();
  void NotifyWindowWillMove(const gfx::Rect& new_bounds, bool* prevent_default);
  void NotifyWindowMoved();
  void NotifyWindowScrollTouchBegin();
  void NotifyWindowScrollTouchEnd();
  void NotifyWindowSwipe(const std::string& direction);
  void NotifyWindowRotateGesture(float rotation);
  void NotifyWindowSheetBegin();
  void NotifyWindowSheetEnd();
  virtual void NotifyWindowEnterFullScreen();
  virtual void NotifyWindowLeaveFullScreen();
  void NotifyWindowEnterHtmlFullScreen();
  void NotifyWindowLeaveHtmlFullScreen();
  void NotifyWindowAlwaysOnTopChanged();
  void NotifyWindowExecuteAppCommand(const std::string& command);
  void NotifyTouchBarItemInteraction(const std::string& item_id,
                                     const base::DictionaryValue& details);
  void NotifyNewWindowForTab();
  void NotifyWindowSystemContextMenu(int x, int y, bool* prevent_default);
#if defined(OS_WIN)
  void NotifyWindowMessage(UINT message, WPARAM w_param, LPARAM l_param);
#endif
  void AddObserver(NativeWindowObserver* obs) { observers_.AddObserver(obs); }
  void RemoveObserver(NativeWindowObserver* obs) {
    observers_.RemoveObserver(obs);
  }
  views::Widget* widget() const { return widget_.get(); }