### 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_browser_window.cc
if (!web_contents())
    return;
  
  api_web_contents_->NotifyUserActivation();
  
  for (NativeBrowserView* view : window_->browser_views()) {
    auto* vwc = view->web_contents();
    auto* api_web_contents = api::WebContents::From(vwc);
    
    if (api_web_contents)
      api_web_contents->NotifyUserActivation();
    if (vwc) {
      if (vwc->NeedToFireBeforeUnloadOrUnloadEvents()) {
        vwc->DispatchBeforeUnload(false );
      }
    }
  }
  if (web_contents()->NeedToFireBeforeUnloadOrUnloadEvents()) {
    web_contents()->DispatchBeforeUnload(false );
  } else {
    web_contents()->Close();
  }
}  
void BrowserWindow::OnWindowBlur() {
  if (api_web_contents_)
    web_contents()->StoreFocus();
  BaseWindow::OnWindowBlur();
}
void BrowserWindow::OnWindowFocus() {