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

net/quic/core/quic_client_session_base.h

 // Copyright 2014 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_QUIC_QUIC_CLIENT_SESSION_BASE_H_
 #define NET_QUIC_QUIC_CLIENT_SESSION_BASE_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 17 matching lines @@
 
 // The maximum time a promises stream can be reserved without being
 // claimed by a client request.
 const int64_t kPushPromiseTimeoutSecs = 60;
 
 // Base class for all client-specific QuicSession subclasses.
 class NET_EXPORT_PRIVATE QuicClientSessionBase
     : public QuicSpdySession,
       public QuicCryptoClientStream::ProofHandler {
  public:
-  // Caller retains ownership of |promised_by_url|.
+  // Takes ownership of |connection|. Caller retains ownership of
+  // |promised_by_url|.
   QuicClientSessionBase(QuicConnection* connection,
                         QuicClientPushPromiseIndex* push_promise_index,
                         const QuicConfig& config);
 
   ~QuicClientSessionBase() override;
 
   void OnConfigNegotiated() override;
 
   // Override base class to set FEC policy before any data is sent by client.
   void OnCryptoHandshakeEvent(CryptoHandshakeEvent event) override;
@@ skipping 80 matching lines @@
   QuicClientPushPromiseIndex* push_promise_index_;
   QuicPromisedByIdMap promised_by_id_;
   QuicStreamId largest_promised_stream_id_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicClientSessionBase);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CLIENT_SESSION_BASE_H_