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

net/quic/core/quic_session_test.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 "net/quic/core/quic_session.h"
 
 #include <set>
 #include <utility>
 
 #include "base/rand_util.h"
@@ skipping 101 matching lines @@
 
 class TestSession : public QuicSpdySession {
  public:
   explicit TestSession(QuicConnection* connection)
       : QuicSpdySession(connection, DefaultQuicConfig()),
         crypto_stream_(this),
         writev_consumes_all_data_(false) {
     Initialize();
   }
 
+  ~TestSession() override { delete connection(); }
+
   TestCryptoStream* GetCryptoStream() override { return &crypto_stream_; }
 
   TestStream* CreateOutgoingDynamicStream(SpdyPriority priority) override {
     TestStream* stream = new TestStream(GetNextOutgoingStreamId(), this);
     stream->SetPriority(priority);
     ActivateStream(stream);
     return stream;
   }
 
   TestStream* CreateIncomingDynamicStream(QuicStreamId id) override {
@@ skipping 1069 matching lines @@
   if (version() <= QUIC_VERSION_35) {
     EXPECT_FALSE(session_.force_hol_blocking());
   } else {
     EXPECT_TRUE(session_.force_hol_blocking());
   }
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net