Implement referred Token Bindings

net/http/http_network_transaction.h

 // 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.
 
 #ifndef NET_HTTP_HTTP_NETWORK_TRANSACTION_H_
 #define NET_HTTP_HTTP_NETWORK_TRANSACTION_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 323 matching lines @@
   SSLFailureState server_ssl_failure_state_;
   // fallback_error_code contains the error code that caused the last TLS
   // fallback. If the fallback connection results in
   // ERR_SSL_INAPPROPRIATE_FALLBACK (i.e. the server indicated that the
   // fallback should not have been needed) then we use this value to return the
   // original error that triggered the fallback.
   int fallback_error_code_;
   // The SSLFailureState which caused the last TLS version fallback.
   SSLFailureState fallback_failure_state_;
 
-  // Key to use for signing message in Token Binding header.
-  scoped_ptr<crypto::ECPrivateKey> token_binding_key_;
-  // Object to manage lookup of |token_binding_key_|.
+  // Keys to use for signing message in Token Binding header.
+  scoped_ptr<crypto::ECPrivateKey> provided_token_binding_key_;
+  scoped_ptr<crypto::ECPrivateKey> referred_token_binding_key_;
+  // Object to manage lookup of |provided_token_binding_key_| and
+  // |referred_token_binding_key_|.
   ChannelIDService::Request token_binding_request_;
 
   HttpRequestHeaders request_headers_;
 
   // The size in bytes of the buffer we use to drain the response body that
   // we want to throw away.  The response body is typically a small error
   // page just a few hundred bytes long.
   static const int kDrainBodyBufferSize = 1024;
 
   // User buffer and length passed to the Read method.
@@ skipping 31 matching lines @@
   ConnectionAttempts connection_attempts_;
   IPEndPoint remote_endpoint_;
   // Network error details for this transaction.
   NetErrorDetails net_error_details_;
   DISALLOW_COPY_AND_ASSIGN(HttpNetworkTransaction);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_NETWORK_TRANSACTION_H_