The [use custom session protocol spec](https://github.com/electron/electron/blob/fea165bef8e1edf99b6e1500da89d015e76cc8e1/spec/api-protocol-spec.js#L874) is curently crashing on master on Windows 64-bit.

For some reason it isn't failing the build though which is why it wasn't caught earlier, will look into that separately.

I bisected and it started happening in https://github.com/electron/electron/pull/9358

```
Backtrace:
        tracked_objects::ThreadData::next [0x00007FF959D9C964+1437860]
        purecall [0x00007FF96DD94A74+52]
        ??1?$MessageT@UInputHostMsg_MoveCaret_ACK_Meta@@V?$tuple@$$V@std@@X@IPC@@UEAA@XZ [0x00007FF94CA8C4B8+13298808]
        ??1?$MessageT@UInputHostMsg_MoveCaret_ACK_Meta@@V?$tuple@$$V@std@@X@IPC@@UEAA@XZ [0x00007FF94CA8C6A8+13299304]
        ??1?$MessageT@UInputHostMsg_MoveCaret_ACK_Meta@@V?$tuple@$$V@std@@X@IPC@@UEAA@XZ [0x00007FF94C612AB5+8606325]
        ??1?$MessageT@UInputHostMsg_MoveCaret_ACK_Meta@@V?$tuple@$$V@std@@X@IPC@@UEAA@XZ [0x00007FF94C612948+8605960]
        ??1?$MessageT@UInputHostMsg_MoveCaret_ACK_Meta@@V?$tuple@$$V@std@@X@IPC@@UEAA@XZ [0x00007FF94C610F34+8599284]
        tracked_objects::ThreadData::next [0x00007FF959C7372D+220781]
        tracked_objects::ThreadData::next [0x00007FF959CAD996+458966]
        tracked_objects::ThreadData::next [0x00007FF959CAC0D0+452624]
        tracked_objects::ThreadData::next [0x00007FF959CB0377+469687]
        tracked_objects::ThreadData::next [0x00007FF959CB0EA4+472548]
        tracked_objects::ThreadData::next [0x00007FF959CF4D1E+750686]
        ??1?$MessageT@UInputHostMsg_MoveCaret_ACK_Meta@@V?$tuple@$$V@std@@X@IPC@@UEAA@XZ [0x00007FF94C60A00F+8570831]
        ??1?$MessageT@UInputHostMsg_MoveCaret_ACK_Meta@@V?$tuple@$$V@std@@X@IPC@@UEAA@XZ [0x00007FF94C60AEB5+8574581]
        tracked_objects::ThreadData::next [0x00007FF959D34BF7+1012535]
        tracked_objects::ThreadData::next [0x00007FF959D28315+961109]
        BaseThreadInitThunk [0x00007FF97ABE8364+20]
        RtlUserThreadStart [0x00007FF97D5670D1+33]
```

/cc @deepak1556 
atom/browser/net/url_request_fetch_job.cc
fetcher_->SetReferrer(request()->referrer());
  else
    fetcher_->SetReferrer(referrer);
  
  if (upload_data && request_type == net::URLFetcher::POST) {
    std::string content_type, data;
    upload_data->GetString("contentType", &content_type);
    upload_data->GetString("data", &data);
    fetcher_->SetUploadData(content_type, data);
  }
  
  fetcher_->SetExtraRequestHeaders(
      request()->extra_request_headers().ToString());
  
  content::StreamContext* stream_context =
      static_cast<brightray::URLRequestContextGetter*>(request_context_getter())
          ->stream_context();
  if (stream_context) {
    GURL stream_url(std::string(url::kBlobScheme) + ":" +
                    formated_url.GetOrigin().spec() + base::GenerateGUID());
    stream_ =
        new content::Stream(stream_context->registry(), nullptr, stream_url);
    stream_->SetReadObserver(this);
    fetcher_->Start();
  } else {
    NotifyStartError(net::URLRequestStatus(net::URLRequestStatus::CANCELED,
                                           net::ERR_ABORTED));
  }
}
void URLRequestFetchJob::HeadersCompleted() {