Instead of initializing QuicSession::next_stream_id_ to 3 in the

net/quic/quic_session.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 "base/stl_util.h"
 #include "net/quic/crypto/proof_verifier.h"
 #include "net/quic/quic_connection.h"
 #include "net/quic/quic_flags.h"
@@ skipping 86 matching lines @@
 
  private:
   QuicSession* session_;
 };
 
 QuicSession::QuicSession(QuicConnection* connection, const QuicConfig& config)
     : connection_(connection),
       visitor_shim_(new VisitorShim(this)),
       config_(config),
       max_open_streams_(config_.max_streams_per_connection()),
-      next_stream_id_(is_server() ? 2 : 3),
+      next_stream_id_(is_server() ? 2 : 5),
       largest_peer_created_stream_id_(0),
       error_(QUIC_NO_ERROR),
       goaway_received_(false),
       goaway_sent_(false),
       has_pending_handshake_(false) {
   if (connection_->version() <= QUIC_VERSION_19) {
     flow_controller_.reset(new QuicFlowController(
         connection_.get(), 0, is_server(), kDefaultFlowControlSendWindow,
         config_.GetInitialFlowControlWindowToSend(),
         config_.GetInitialFlowControlWindowToSend()));
   } else {
     flow_controller_.reset(new QuicFlowController(
         connection_.get(), 0, is_server(), kDefaultFlowControlSendWindow,
         config_.GetInitialSessionFlowControlWindowToSend(),
         config_.GetInitialSessionFlowControlWindowToSend()));
   }
 }
 
 void QuicSession::InitializeSession() {
   connection_->set_visitor(visitor_shim_.get());
   connection_->SetFromConfig(config_);
   if (connection_->connected()) {
     connection_->SetOverallConnectionTimeout(
         config_.max_time_before_crypto_handshake());
   }
   headers_stream_.reset(new QuicHeadersStream(this));
-  if (!is_server()) {
-    // For version above QUIC v12, the headers stream is stream 3, so the
-    // next available local stream ID should be 5.
-    DCHECK_EQ(kHeadersStreamId, next_stream_id_);
-    next_stream_id_ += 2;
-  }
 }
 
 QuicSession::~QuicSession() {
   STLDeleteElements(&closed_streams_);
   STLDeleteValues(&stream_map_);
 
   DLOG_IF(WARNING,
           locally_closed_streams_highest_offset_.size() > max_open_streams_)
       << "Surprisingly high number of locally closed streams still waiting for "
          "final byte offset: " << locally_closed_streams_highest_offset_.size();
@@ skipping 615 matching lines @@
   }
   for (DataStreamMap::iterator it = stream_map_.begin();
        it != stream_map_.end(); ++it) {
     if (version <= QUIC_VERSION_16) {
       it->second->flow_controller()->Disable();
     }
   }
 }
 
 }  // namespace net