[Chromoting] Move SharedSecretHash from Me2MeHostAuthenticatorFactory to AuthenticationMethod.

remoting/protocol/me2me_host_authenticator_factory.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 "remoting/protocol/me2me_host_authenticator_factory.h"
 
 #include "base/base64.h"
 #include "base/string_util.h"
 #include "crypto/rsa_private_key.h"
 #include "remoting/protocol/channel_authenticator.h"
@@ skipping 39 matching lines @@
     NOTREACHED();
     return scoped_ptr<ChannelAuthenticator>(NULL);
   }
 
  protected:
   State state_;
 };
 
 }  // namespace
 
-bool SharedSecretHash::Parse(const std::string& as_string) {
-  size_t separator = as_string.find(':');
-  if (separator == std::string::npos)
-    return false;
-
-  std::string function_name = as_string.substr(0, separator);
-  if (function_name == "plain") {
-    hash_function = AuthenticationMethod::NONE;
-  } else if (function_name == "hmac") {
-    hash_function = AuthenticationMethod::HMAC_SHA256;
-  } else {
-    return false;
-  }
-
-  if (!base::Base64Decode(as_string.substr(separator + 1), &value)) {
-    return false;
-  }
-
-  return true;
-}
-
 Me2MeHostAuthenticatorFactory::Me2MeHostAuthenticatorFactory(
     const std::string& local_jid,
     const std::string& local_cert,
     const crypto::RSAPrivateKey& local_private_key,
     const SharedSecretHash& shared_secret_hash)
     : local_cert_(local_cert),
       local_private_key_(local_private_key.Copy()),
       shared_secret_hash_(shared_secret_hash) {
   // Verify that |local_jid| is bare.
   DCHECK_EQ(local_jid.find('/'), std::string::npos);
@@ skipping 26 matching lines @@
     }
   }
 
   return NegotiatingAuthenticator::CreateForHost(
       local_cert_, *local_private_key_, shared_secret_hash_.value,
       shared_secret_hash_.hash_function);
 }
 
 }  // namespace protocol
 }  // namespace remoting