Cleanup: Use AUTH_SCHEME enum instead of a string.

net/http/http_auth_handler_negotiate.cc

 // Copyright (c) 2010 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.
 
 #include "net/http/http_auth_handler_negotiate.h"
 
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 75 matching lines @@
   }
   // GSSAPI does not provide a way to enter username/password to
   // obtain a TGT. If the default credentials are not allowed for
   // a particular site (based on whitelist), fall back to a
   // different scheme.
   if (!AllowsDefaultCredentials())
     return false;
 #endif
   if (CanDelegate())
     auth_system_.Delegate();
-  auth_scheme_ = AUTH_SCHEME_NEGOTIATE;
-  scheme_ = "negotiate";
+  auth_scheme_ = HttpAuth::AUTH_SCHEME_NEGOTIATE;
   score_ = 4;
   properties_ = ENCRYPTS_IDENTITY | IS_CONNECTION_BASED;
   HttpAuth::AuthorizationResult auth_result =
       auth_system_.ParseChallenge(challenge);
   return (auth_result == HttpAuth::AUTHORIZATION_RESULT_ACCEPT);
 }
 
 HttpAuth::AuthorizationResult HttpAuthHandlerNegotiate::HandleAnotherChallenge(
     HttpAuth::ChallengeTokenizer* challenge) {
   return auth_system_.ParseChallenge(challenge);
@@ skipping 216 matching lines @@
                                    resolver_, disable_cname_lookup_,
                                    use_port_));
   if (!tmp_handler->InitFromChallenge(challenge, target, origin, net_log))
     return ERR_INVALID_RESPONSE;
   handler->swap(tmp_handler);
   return OK;
 #endif
 }
 
 }  // namespace net