Use SSPI for NTLM authentication on Windows.

net/net.gyp

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/common.gypi',
@@ skipping 203 matching lines @@
         'http/http_auth_cache.cc',
         'http/http_auth_cache.h',
         'http/http_auth_handler.h',
         'http/http_auth_handler.cc',
         'http/http_auth_handler_basic.cc',
         'http/http_auth_handler_basic.h',
         'http/http_auth_handler_digest.cc',
         'http/http_auth_handler_digest.h',
         'http/http_auth_handler_ntlm.cc',
         'http/http_auth_handler_ntlm.h',
+        'http/http_auth_handler_ntlm_portable.cc',
+        'http/http_auth_handler_ntlm_win.cc',
         'http/http_basic_stream.h',
         'http/http_byte_range.cc',
         'http/http_byte_range.h',
         'http/http_cache.cc',
         'http/http_cache.h',
         'http/http_chunked_decoder.cc',
         'http/http_chunked_decoder.h',
         'http/http_network_layer.cc',
         'http/http_network_layer.h',
         'http/http_network_session.cc',
@@ skipping 138 matching lines @@
         [ 'OS == "linux"', {
           'dependencies': [
             '../build/linux/system.gyp:gconf',
             '../build/linux/system.gyp:gdk',
             '../build/linux/system.gyp:nss',
           ],
         }],
         [ 'OS == "win"', {
             'sources/': [ ['exclude', '_(mac|linux|posix)\\.cc$'] ],
             'sources!': [
+              'http/http_auth_handler_ntlm_portable.cc',
               'socket/tcp_client_socket_libevent.cc',
             ],
             'dependencies': [
               'tld_cleanup',
             ],
           },
           {  # else: OS != "win"
             'sources!': [
               'base/wininet_util.cc',
               'base/winsock_init.cc',
@@ skipping 335 matching lines @@
             'tools/dump_cache/dump_cache.cc',
             'tools/dump_cache/dump_files.cc',
             'tools/dump_cache/upgrade.cc',
             'tools/dump_cache/url_to_filename_encoder.h',
           ],
         },
       ],
     }],
   ],
 }