First step to remove SingleRequestHostResolver.

net/http/http_auth_handler_negotiate.h

 // Copyright (c) 2011 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.
 
 #ifndef NET_HTTP_HTTP_AUTH_HANDLER_NEGOTIATE_H_
 #define NET_HTTP_HTTP_AUTH_HANDLER_NEGOTIATE_H_
 
 #include <string>
 #include <utility>
 
 #include "build/build_config.h"
 #include "net/base/address_list.h"
 #include "net/base/net_export.h"
+#include "net/dns/host_resolver.h"
 #include "net/http/http_auth_handler.h"
 #include "net/http/http_auth_handler_factory.h"
 
 #if defined(OS_ANDROID)
 #include "net/android/http_auth_negotiate_android.h"
 #elif defined(OS_WIN)
 #include "net/http/http_auth_sspi_win.h"
 #elif defined(OS_POSIX)
 #include "net/http/http_auth_gssapi_posix.h"
 #endif
 
 namespace net {
 
 class HttpAuthPreferences;
-class HostResolver;
-class SingleRequestHostResolver;
 
 // Handler for WWW-Authenticate: Negotiate protocol.
 //
 // See http://tools.ietf.org/html/rfc4178 and http://tools.ietf.org/html/rfc4559
 // for more information about the protocol.
 
 class NET_EXPORT_PRIVATE HttpAuthHandlerNegotiate : public HttpAuthHandler {
  public:
 #if defined(OS_ANDROID)
   typedef net::android::HttpAuthNegotiateAndroid AuthSystem;
@@ skipping 90 matching lines @@
   int DoResolveCanonicalNameComplete(int rv);
   int DoGenerateAuthToken();
   int DoGenerateAuthTokenComplete(int rv);
   bool CanDelegate() const;
 
   AuthSystem auth_system_;
   HostResolver* const resolver_;
 
   // Members which are needed for DNS lookup + SPN.
   AddressList address_list_;
-  std::unique_ptr<SingleRequestHostResolver> single_resolve_;
+  std::unique_ptr<net::HostResolver::Request> request_;
 
   // Things which should be consistent after first call to GenerateAuthToken.
   bool already_called_;
   bool has_credentials_;
   AuthCredentials credentials_;
   std::string spn_;
   std::string channel_bindings_;
 
   // Things which vary each round.
   CompletionCallback callback_;
   std::string* auth_token_;
 
   State next_state_;
 
   const HttpAuthPreferences* http_auth_preferences_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_AUTH_HANDLER_NEGOTIATE_H_