[net/http auth] Use strings to identify authentication schemes.

net/net.gypi

 # Copyright 2014 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.
 
 # This file is shared between the regular GYP build, the NaCl GYP build, and
 # the GN build. For GN support, it must have no conditionals or anything like
 # that beyond the simple one-level-deep dictionary of values.
 {
   'variables': {
     # Subset of net source files that are compiled for NaCl (net_nacl target).
@@ skipping 801 matching lines @@
       'http/http_auth_handler_factory.cc',
       'http/http_auth_handler_factory.h',
       'http/http_auth_handler_negotiate.cc',
       'http/http_auth_handler_negotiate.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_auth_multi_round_parse.cc',
       'http/http_auth_multi_round_parse.h',
+      'http/http_auth_scheme_set.cc',
+      'http/http_auth_scheme_set.h',
       'http/http_auth_sspi_win.cc',
       'http/http_auth_sspi_win.h',
       'http/http_basic_state.cc',
       'http/http_basic_state.h',
       'http/http_basic_stream.cc',
       'http/http_basic_stream.h',
       'http/http_cache.cc',
       'http/http_cache.h',
       'http/http_cache_transaction.cc',
       'http/http_cache_transaction.h',
@@ skipping 1054 matching lines @@
       'docs/bug-triage.md',
       'docs/bug-triage-labels.md',
       'docs/bug-triage-suggested-workflow.md',
       'docs/code-patterns.md',
       'docs/life-of-a-url-request.md',
       'sdch/README.md',
     ],
     'net_docs_output_dir': '<(PRODUCT_DIR)/net/docs',
   }
 }