### 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

15.0.0-alpha.10

### What operating system are you using?

macOS

### Operating System Version

macOS Big Sur 11.5.2

### What arch are you using?

x64

### Last Known Working Electron version

This feature never worked before

### Expected Behavior

`navigator.fonts.query()` should return a promise which in turn should resolve with a list of fonts provided by the operating system.

### Actual Behavior

`navigator.fonts.query()` causes the renderer process to crash (the window becomes gray and the dev tools are disconnected).

### Testcase Gist URL

_No response_

### Additional Information

`navigator.fonts.query()` is part of the experimental [Local Font Access API](https://www.chromestatus.com/feature/6234451761692672) and it must be first enabled by adding `FontAccess` to `webPreferences.enableBlinkFeatures`.

I was also able to reproduce this bug with Electron 13.2.3. I was unable to reproduce it with Chrome 92.
shell/browser/electron_browser_client.h
void RenderProcessReady(content::RenderProcessHost* host) override;
  void RenderProcessExited(
      content::RenderProcessHost* host,
      const content::ChildProcessTerminationInfo& info) override;
 private:
  content::SiteInstance* GetSiteInstanceFromAffinity(
      content::BrowserContext* browser_context,
      const GURL& url,
      content::RenderFrameHost* rfh) const;
  bool IsRendererSubFrame(int process_id) const;
  
  std::map<int, content::WebContents*> pending_processes_;
  std::set<int> renderer_is_subframe_;
  std::unique_ptr<PlatformNotificationService> notification_service_;
  std::unique_ptr<NotificationPresenter> notification_presenter_;
  Delegate* delegate_ = nullptr;
  std::string user_agent_override_ = "";
  
  
  uint64_t next_id_ = 0;
  std::unique_ptr<ElectronSerialDelegate> serial_delegate_;
  std::unique_ptr<ElectronBluetoothDelegate> bluetooth_delegate_;
#if defined(OS_MAC)
  ElectronBrowserMainParts* browser_main_parts_ = nullptr;
#endif
  DISALLOW_COPY_AND_ASSIGN(ElectronBrowserClient);
};
}  
#endif