Fixes use-after-free bug in QUIC.

net/quic/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/quic_session.h"
 
 #include <set>
 
 #include "base/rand_util.h"
 #include "base/stl_util.h"
@@ skipping 1144 matching lines @@
 
   // Reset stream locally.
   EXPECT_CALL(*connection_, SendRstStream(stream->id(), _, _));
   stream->Reset(QUIC_STREAM_CANCELLED);
   EXPECT_TRUE(ReliableQuicStreamPeer::read_side_closed(stream));
 
   // Allow the session to delete the stream object.
   session_.PostProcessAfterData();
   EXPECT_TRUE(connection_->connected());
   EXPECT_TRUE(QuicSessionPeer::IsStreamClosed(&session_, stream_id));
-  EXPECT_EQ(nullptr, QuicSessionPeer::dynamic_streams(&session_)[stream_id]);
+  EXPECT_FALSE(QuicSessionPeer::IsStreamCreated(&session_, stream_id));
 
   // The stream is not waiting for the arrival of the peer's final offset as it
   // was received with the FIN earlier.
   EXPECT_EQ(
       0u,
       QuicSessionPeer::GetLocallyClosedStreamsHighestOffset(&session_).size());
 }
 
 TEST_P(QuicSessionTestClient, TestMaxIncomingAndOutgoingStreamsAllowed) {
   // Tests that on client side, the value of max_open_incoming/outgoing streams
   // are setup correctly during negotiation.
   // When flag is true, the value for outgoing stream is limited to negotiated
   // value and for incoming stream it is set to be larger than that.
   session_.OnConfigNegotiated();
   EXPECT_LT(session_.max_open_outgoing_streams(),
             session_.max_open_incoming_streams());
   EXPECT_EQ(session_.max_open_outgoing_streams(),
             kDefaultMaxStreamsPerConnection);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace net