Remove HttpAuth::Scheme enum in favor of a string.

net/http/http_auth_handler_negotiate.cc

 // Copyright (c) 2012 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/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "base/string_util.h"
@@ skipping 185 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_ = HttpAuth::AUTH_SCHEME_NEGOTIATE;
+  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);
 }
 
 int HttpAuthHandlerNegotiate::GenerateAuthTokenImpl(
     const AuthCredentials* credentials, const HttpRequestInfo* request,
     const CompletionCallback& callback, std::string* auth_token) {
@@ skipping 113 matching lines @@
 bool HttpAuthHandlerNegotiate::CanDelegate() const {
   // TODO(cbentzel): Should delegation be allowed on proxies?
   if (target_ == HttpAuth::AUTH_PROXY)
     return false;
   if (!url_security_manager_)
     return false;
   return url_security_manager_->CanDelegate(origin_);
 }
 
 }  // namespace net