### 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
views::View* content_view() const { return content_view_; }
  bool has_frame() const { return has_frame_; }
  void set_has_frame(bool has_frame) { has_frame_ = has_frame; }
  bool transparent() const { return transparent_; }
  bool enable_larger_than_screen() const { return enable_larger_than_screen_; }
  NativeWindow* parent() const { return parent_; }
  bool is_modal() const { return is_modal_; }
  std::list<NativeBrowserView*> browser_views() const { return browser_views_; }
  int32_t window_id() const { return next_id_; }
 protected:
  NativeWindow(const gin_helper::Dictionary& options, NativeWindow* parent);
  
  views::Widget* GetWidget() override;
  const views::Widget* GetWidget() const override;
  std::u16string GetAccessibleWindowTitle() const override;
  void set_content_view(views::View* view) { content_view_ = view; }
  void add_browser_view(NativeBrowserView* browser_view) {
    browser_views_.push_back(browser_view);
  }
  void remove_browser_view(NativeBrowserView* browser_view) {
    browser_views_.remove_if(
        [&browser_view](NativeBrowserView* n) { return (n == browser_view); });
  }
 private:
  std::unique_ptr<views::Widget> widget_;
  static int32_t next_id_;
  
  views::View* content_view_ = nullptr;
  
  bool has_frame_ = true;