### 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.cc
ZoomLevelDelegate::RegisterPrefs(registry.get());
  PrefProxyConfigTrackerImpl::RegisterPrefs(registry.get());
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
  if (!in_memory_)
    extensions::ExtensionPrefs::RegisterProfilePrefs(registry.get());
#endif
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
  BrowserContextDependencyManager::GetInstance()
      ->RegisterProfilePrefsForServices(registry.get());
  language::LanguagePrefs::RegisterProfilePrefs(registry.get());
#endif
  prefs_ = prefs_factory.Create(
      registry.get(),
      std::make_unique<PrefStoreDelegate>(weak_factory_.GetWeakPtr()));
  prefs_->UpdateCommandLinePrefStore(new ValueMapPrefStore);
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS) || \
    BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
  user_prefs::UserPrefs::Set(this, prefs_.get());
#endif
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
  auto* current_dictionaries =
      prefs()->Get(spellcheck::prefs::kSpellCheckDictionaries);
  
  if (current_dictionaries->GetListDeprecated().empty()) {
    std::string default_code = spellcheck::GetCorrespondingSpellCheckLanguage(
        base::i18n::GetConfiguredLocale());
    if (!default_code.empty()) {
      base::ListValue language_codes;
      language_codes.Append(default_code);
      prefs()->Set(spellcheck::prefs::kSpellCheckDictionaries, language_codes);