Remove dependency on headers stream from QuicSession.

net/quic/quic_client_session_base.cc

 // 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.
 
 #include "net/quic/quic_client_session_base.h"
 
 #include "net/quic/quic_flags.h"
 
 namespace net {
 
-QuicClientSessionBase::QuicClientSessionBase(
-    QuicConnection* connection,
-    const QuicConfig& config)
-    : QuicSession(connection, config) {}
+QuicClientSessionBase::QuicClientSessionBase(QuicConnection* connection,
+                                             const QuicConfig& config)
+    : QuicSpdySession(connection, config) {
+}
 
 QuicClientSessionBase::~QuicClientSessionBase() {}
 
 void QuicClientSessionBase::OnCryptoHandshakeEvent(CryptoHandshakeEvent event) {
   QuicSession::OnCryptoHandshakeEvent(event);
   // Set FEC policy for streams immediately after sending CHLO and before any
   // more data is sent.
   if (!FLAGS_enable_quic_fec ||
       event != ENCRYPTION_FIRST_ESTABLISHED ||
       !config()->HasSendConnectionOptions() ||
       !ContainsQuicTag(config()->SendConnectionOptions(), kFHDR)) {
     return;
   }
   // kFHDR config maps to FEC protection always for headers stream.
   // TODO(jri): Add crypto stream in addition to headers for kHDR.
-  headers_stream_->set_fec_policy(FEC_PROTECT_ALWAYS);
+  headers_stream()->set_fec_policy(FEC_PROTECT_ALWAYS);
 }
 
 }  // namespace net