Refactor TokenValidatorImpl into a base class + implementation.

remoting/protocol/third_party_host_authenticator.cc

 // Copyright 2013 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 "remoting/protocol/third_party_host_authenticator.h"
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "remoting/base/constants.h"
 #include "remoting/base/rsa_key_pair.h"
+#include "remoting/protocol/token_validator.h"
 #include "remoting/protocol/v2_authenticator.h"
 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
 
 namespace remoting {
 namespace protocol {
 
 ThirdPartyHostAuthenticator::ThirdPartyHostAuthenticator(
     const std::string& local_cert,
     scoped_refptr<RsaKeyPair> key_pair,
     scoped_ptr<TokenValidator> token_validator)
@@ skipping 62 matching lines @@
 
   // The other side already started the SPAKE authentication.
   token_state_ = ACCEPTED;
   underlying_ = V2Authenticator::CreateForHost(
       local_cert_, key_pair_, shared_secret, WAITING_MESSAGE);
   underlying_->ProcessMessage(message, resume_callback);
 }
 
 }  // namespace protocol
 }  // namespace remoting