- Electron version: >=0.37
- Operating system: ubuntu linux x64

When server send header 'WWW-Authenticate: Negotiate' electron not send kerberos ticket. 
`app.allowNTLMCredentialsForAllDomains(true)`  is called.

On electron v0.36.x it work's fine.

atom/browser/atom_browser_context.cc
int CreateBackend(net::NetLog* net_log,
                    scoped_ptr<disk_cache::Backend>* backend,
                    const net::CompletionCallback& callback) override {
    return net::ERR_FAILED;
  }
};
std::string RemoveWhitespace(const std::string& str) {
  std::string trimmed;
  if (base::RemoveChars(str, " ", &trimmed))
    return trimmed;
  else
    return str;
}
}  
AtomBrowserContext::AtomBrowserContext(const std::string& partition,
                                       bool in_memory)
    : brightray::BrowserContext(partition, in_memory),
      cert_verifier_(new AtomCertVerifier),
      job_factory_(new AtomURLRequestJobFactory),
      network_delegate_(new AtomNetworkDelegate),
      allow_ntlm_everywhere_(false) {
}
AtomBrowserContext::~AtomBrowserContext() {
}
net::NetworkDelegate* AtomBrowserContext::CreateNetworkDelegate() {
  return network_delegate_;
}
std::string AtomBrowserContext::GetUserAgent() {