- 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
#include "atom/browser/net/asar/asar_protocol_handler.h"
#include "atom/browser/net/http_protocol_handler.h"
#include "atom/browser/atom_permission_manager.h"
#include "atom/browser/web_view_manager.h"
#include "atom/common/atom_version.h"
#include "atom/common/chrome_version.h"
#include "atom/common/options_switches.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/path_service.h"
#include "components/prefs/pref_registry_simple.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/threading/sequenced_worker_pool.h"
#include "base/threading/worker_pool.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/url_constants.h"
#include "content/public/common/user_agent.h"
#include "net/ftp/ftp_network_layer.h"
#include "net/url_request/data_protocol_handler.h"
#include "net/url_request/ftp_protocol_handler.h"
#include "net/url_request/url_request_intercepting_job_factory.h"
#include "net/url_request/url_request_context.h"
#include "url/url_constants.h"
using content::BrowserThread;
namespace atom {
namespace {
class NoCacheBackend : public net::HttpCache::BackendFactory {