### 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
const gin_helper::Dictionary& options);
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
  void InitWithExtensionView(v8::Isolate* isolate,
                             content::WebContents* web_contents,
                             extensions::mojom::ViewType view_type);
#endif
  
  bool DidAddMessageToConsole(content::WebContents* source,
                              blink::mojom::ConsoleMessageLevel level,
                              const std::u16string& message,
                              int32_t line_no,
                              const std::u16string& source_id) override;
  bool IsWebContentsCreationOverridden(
      content::SiteInstance* source_site_instance,
      content::mojom::WindowContainerType window_container_type,
      const GURL& opener_url,
      const content::mojom::CreateNewWindowParams& params) override;
  content::WebContents* CreateCustomWebContents(
      content::RenderFrameHost* opener,
      content::SiteInstance* source_site_instance,