### 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
const net::RedirectInfo& redirect_info,
    int error_code) {
  if (error_code != net::OK) {
    OnRequestError(network::URLLoaderCompletionStatus(error_code));
    return;
  }
  info_->AddResponseInfoFromResourceResponse(*current_response_);
  if (proxied_client_receiver_.is_bound())
    proxied_client_receiver_.Resume();
  factory_->web_request_api()->OnBeforeRedirect(&info_.value(), request_,
                                                redirect_info.new_url);
  target_client_->OnReceiveRedirect(redirect_info, current_response_.Clone());
  request_.url = redirect_info.new_url;
  request_.method = redirect_info.new_method;
  request_.site_for_cookies = redirect_info.new_site_for_cookies;
  request_.referrer = GURL(redirect_info.new_referrer);
  request_.referrer_policy = redirect_info.new_referrer_policy;
  
  
  if (request_.method == net::HttpRequestHeaders::kGetMethod)
    request_.request_body = nullptr;
}
void ProxyingURLLoaderFactory::InProgressRequest::