### 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
#include "shell/common/electron_paths.h"
#include "shell/common/options_switches.h"
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
#include "extensions/browser/browser_context_keyed_service_factories.h"
#include "extensions/browser/extension_pref_store.h"
#include "extensions/browser/extension_pref_value_map_factory.h"
#include "extensions/browser/extension_prefs.h"
#include "extensions/browser/pref_names.h"
#include "extensions/common/extension_api.h"
#include "shell/browser/extensions/electron_browser_context_keyed_service_factories.h"
#include "shell/browser/extensions/electron_extension_system.h"
#include "shell/browser/extensions/electron_extension_system_factory.h"
#include "shell/browser/extensions/electron_extensions_browser_client.h"
#include "shell/common/extensions/electron_extensions_client.h"
#endif  
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS) || \
    BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/user_prefs/user_prefs.h"
#endif
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
#include "base/i18n/rtl.h"
#include "components/language/core/browser/language_prefs.h"
#include "components/spellcheck/browser/pref_names.h"
#include "components/spellcheck/common/spellcheck_common.h"
#endif
using content::BrowserThread;
namespace electron {
namespace {
std::string MakePartitionName(const std::string& input) {