### 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.cc
content::RenderFrameHost* render_frame_host) {
  auto* rwhv = render_frame_host->GetView();
  if (!rwhv)
    return;
  
  auto* web_preferences = WebContentsPreferences::From(ontents());
  if (web_preferences) {
    std::string color_name;
    if (web_preferences->GetPreference(options::kBackgroundColor,
                                       &color_name)) {
      rwhv->SetBackgroundColor(ParseHexColor(color_name));
    } else {
      rwhv->SetBackgroundColor(SK_ColorTRANSPARENT);
    }
  }
  if (!background_throttling_)
    render_frame_host->GetRenderViewHost()->SetSchedulerThrottling(false);
  auto* rwh_impl =
      static_cast<content::RenderWidgetHostImpl*>(rwhv->GetRenderWidgetHost());
  if (rwh_impl)
    rwh_impl->disable_hidden_ = !background_throttling_;
  WebFrameMain::RenderFrameCreated(render_frame_host);
}
void WebContents::RenderFrameCreated(
    content::RenderFrameHost* render_frame_host) {
  HandleNewRenderFrame(render_frame_host);
}
void WebContents::RenderViewDeleted(content::RenderViewHost* render_view_host) {