- 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/api/atom_api_app.h
}
namespace mate {
class Arguments;
}
namespace atom {
namespace api {
class App : public AtomBrowserClient::Delegate,
            public mate::EventEmitter<App>,
            public BrowserObserver,
            public content::GpuDataManagerObserver {
 public:
  static mate::Handle<App> Create(v8::Isolate* isolate);
  static void BuildPrototype(v8::Isolate* isolate,
                             v8::Local<v8::ObjectTemplate> prototype);
  
  void OnCreateWindow(const GURL& target_url,
                      const std::string& frame_name,
                      WindowOpenDisposition disposition,
                      int render_process_id,
                      int render_frame_id);
#if defined(USE_NSS_CERTS)
  void OnCertificateManagerModelCreated(
      scoped_ptr<base::DictionaryValue> options,
      const net::CompletionCallback& callback,
      scoped_ptr<CertificateManagerModel> model);
#endif
 protected:
  explicit App(v8::Isolate* isolate);
  ~App() override;