### 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 for an issue that matches the one I want to file, without success.

### Issue Details

* **Electron Version:**
* 9.0.0, 9.2.0, 9.2.1 0 All broken

* **Operating System:**
  * Windows 10 (1809)
* **Last Known Working Electron version:**
  * 8.5.0

### Expected Behavior
When requesting url's and having a socket connect, when it is rejected with proxy authentication required, consistently try again with the proxy authentication credentials.

### Actual Behavior
See logs - good and bad.
In the good logs, electron always makes a 2nd socket request with the proxy authentication headers and succeeds. In the bad logs, electron does not make a 2nd socket request.
Note that for the first socket request on a web page, it works, but when a second socket is opened to make requests it seems to fail.

### To Reproduce
Be behind a NTLM proxy that requires authentication for a domain
Visit a website that makes multiple requests so that multiple sockets are opened.

shell/browser/net/proxying_url_loader_factory.cc
target_factory_->CreateLoaderAndStart(std::move(loader), request_id,
                                          options, request, std::move(client),
                                          traffic_annotation);
    return;
  }
  
  
  
  
  const uint64_t web_request_id = ++(*request_id_generator_);
  
  
  
  
  if (request_id)
    network_request_id_to_web_request_id_.emplace(request_id, web_request_id);
  auto result = requests_.emplace(
      web_request_id,
      std::make_unique<InProgressRequest>(
          this, web_request_id, view_routing_id_, frame_routing_id_, request_id,
          options, request, traffic_annotation, std::move(loader),
          std::move(client)));
  result.first->second->Restart();
}
void ProxyingURLLoaderFactory::Clone(
    mojo::PendingReceiver<network::mojom::URLLoaderFactory> loader_receiver) {
  proxy_receivers_.Add(this, std::move(loader_receiver));
}
void ProxyingURLLoaderFactory::OnLoaderCreated(