net: split the SSL session cache between incognito and normal.

net/socket/ssl_client_socket_openssl.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_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
 #define NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 25 matching lines @@
   // The given hostname will be compared with the name(s) in the server's
   // certificate during the SSL handshake.  ssl_config specifies the SSL
   // settings.
   SSLClientSocketOpenSSL(ClientSocketHandle* transport_socket,
                          const HostPortPair& host_and_port,
                          const SSLConfig& ssl_config,
                          const SSLClientSocketContext& context);
   ~SSLClientSocketOpenSSL();
 
   const HostPortPair& host_and_port() const { return host_and_port_; }
+  const std::string& ssl_session_cache_shard() const {
+    return ssl_session_cache_shard_;
+  }
 
   // Callback from the SSL layer that indicates the remote server is requesting
   // a certificate for this client.
   int ClientCertRequestCallback(SSL* ssl, X509** x509, EVP_PKEY** pkey);
 
   // Callback from the SSL layer to check which NPN protocol we are supporting
   int SelectNextProtoCallback(unsigned char** out, unsigned char* outlen,
                               const unsigned char* in, unsigned int inlen);
 
   // SSLClientSocket implementation.
@@ skipping 88 matching lines @@
   CertVerifier* const cert_verifier_;
   scoped_ptr<SingleRequestCertVerifier> verifier_;
 
   // OpenSSL stuff
   SSL* ssl_;
   BIO* transport_bio_;
 
   scoped_ptr<ClientSocketHandle> transport_;
   const HostPortPair host_and_port_;
   SSLConfig ssl_config_;
+  // ssl_session_cache_shard_ is an opaque string that partitions the SSL
+  // session cache. i.e. sessions created with one value will not attempt to
+  // resume on the socket with a different value.
+  const std::string ssl_session_cache_shard_;
 
   // Used for session cache diagnostics.
   bool trying_cached_session_;
 
   enum State {
     STATE_NONE,
     STATE_HANDSHAKE,
     STATE_VERIFY_CERT,
     STATE_VERIFY_CERT_COMPLETE,
   };
   State next_handshake_state_;
   NextProtoStatus npn_status_;
   std::string npn_proto_;
   std::string server_protos_;
   BoundNetLog net_log_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_