### 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

14.0.0 beta 9

### What operating system are you using?

macOS

### Operating System Version

macOS Catalina 10.15.7

### What arch are you using?

x64

### Last Known Working Electron version

14.0.0 beta 8

### Expected Behavior

`console.log(app.getPath('userData'))` in main.js in Fiddle should output something like `/Users/miburda/Library/Application Support/stereotyped-rub-drain-i2tik`

### Actual Behavior

`console.log(app.getPath('userData'))` in main.js in Fiddle outputs `/Users/miburda/Library/Application Support/Electron`

### Testcase Gist URL

_No response_

### Additional Information

Seems to be regressed by #29649. Happens both before and after `app.whenReady()`.
shell/app/electron_main_delegate.cc
command_line->AppendSwitch(
      ::switches::kDisableGpuMemoryBufferCompositorResources);
#endif
  content_client_ = std::make_unique<ElectronContentClient>();
  SetContentClient(content_client_.get());
  return false;
}
void ElectronMainDelegate::PreSandboxStartup() {
  auto* command_line = base::CommandLine::ForCurrentProcess();
  std::string process_type =
      command_line->GetSwitchValueASCII(::switches::kProcessType);
  base::FilePath user_data_dir =
      command_line->GetSwitchValuePath(::switches::kUserDataDir);
  if (!user_data_dir.empty()) {
    base::PathService::OverrideAndCreateIfNeeded(chrome::DIR_USER_DATA,
                                                 user_data_dir, false, true);
  }
#if !defined(OS_WIN)