### 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

13.1.7

### What operating system are you using?

Windows

### Operating System Version

Windows 10 version 20H2

### What arch are you using?

x64

### Last Known Working Electron version

12.0.15

### Expected Behavior

Checking `navigator.userAgentData` in Chrome 91 returns an array of brands appropriately. Electron 13/14 do not return anything.

This appears to then become a problem for my situation. I am posting a form with hidden variables to a third-party vendor I work with. This form post ultimately loads an iframe.

Expected: As it does in Chrome 91, load the iframe from this third-party vendor.

### Actual Behavior

A header of "sec-ch-ua" is included in the request to the third-party vendor and it is blank. They are rejecting the post because of an invalid header. I suspect this is because Chrome 13/14 does not make this hint data made available correctly.

I tried loading various sites in Chrome 91 that do load brand names in Electron 13/14 and they are empty if you review `navigator.userAgentData`.

### Testcase Gist URL

_No response_

### Additional Information

_No response_
shell/browser/electron_browser_context.h
ValueMapPrefStore* in_memory_pref_store_ = nullptr;
  std::unique_ptr<content::ResourceContext> resource_context_;
  std::unique_ptr<CookieChangeNotifier> cookie_change_notifier_;
  std::unique_ptr<PrefService> prefs_;
  std::unique_ptr<ElectronDownloadManagerDelegate> download_manager_delegate_;
  std::unique_ptr<WebViewManager> guest_manager_;
  std::unique_ptr<ElectronPermissionManager> permission_manager_;
  std::unique_ptr<MediaDeviceIDSalt> media_device_id_salt_;
  scoped_refptr<ResolveProxyHelper> resolve_proxy_helper_;
  scoped_refptr<storage::SpecialStoragePolicy> storage_policy_;
  std::unique_ptr<predictors::PreconnectManager> preconnect_manager_;
  std::unique_ptr<ProtocolRegistry> protocol_registry_;
  std::string user_agent_;
  base::FilePath path_;
  bool in_memory_ = false;
  bool use_cache_ = true;
  int max_cache_size_ = 0;
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
  
  extensions::ElectronExtensionSystem* extension_system_;
#endif
  
  scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory_;
  network::mojom::SSLConfigPtr ssl_config_;
  mojo::Remote<network::mojom::SSLConfigClient> ssl_config_client_;
  base::WeakPtrFactory<ElectronBrowserContext> weak_factory_{this};
};
}  
#endif