QuicSession no longer directly owns its QuicConnection. Not flag protected.

net/quic/core/quic_server_session_base.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.
 //
 // A server specific QuicSession subclass.
 
 #ifndef NET_QUIC_QUIC_SERVER_SESSION_BASE_H_
 #define NET_QUIC_QUIC_SERVER_SESSION_BASE_H_
 
 #include <stdint.h>
@@ skipping 56 matching lines @@
         QuicConnectionId connection_id) const = 0;
 
     // Returns true if |message|, which was received on |self_address| is
     // acceptable according to the visitor's policy. Otherwise, returns false
     // and populates |error_details|.
     virtual bool CanAcceptClientHello(const CryptoHandshakeMessage& message,
                                       const IPEndPoint& self_address,
                                       std::string* error_details) const = 0;
   };
 
-  // |crypto_config| must outlive the session.
+  // Does not take ownership of |connection|. |crypto_config| must outlive the
+  // session.
   QuicServerSessionBase(const QuicConfig& config,
                         QuicConnection* connection,
                         Visitor* visitor,
                         Helper* helper,
                         const QuicCryptoServerConfig* crypto_config,
                         QuicCompressedCertsCache* compressed_certs_cache);
 
   // Override the base class to notify the owner of the connection close.
   void OnConnectionClosed(QuicErrorCode error,
                           const std::string& error_details,
@@ skipping 92 matching lines @@
   // Set during handshake. If true, resources in x-associated-content and link
   // headers will be pushed. see: go/gfe_server_push.
   bool server_push_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicServerSessionBase);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_SERVER_SESSION_BASE_H_