Add a QUIC tag to connection options to allow negotiating 1 connection

net/quic/quic_sent_packet_manager.cc

 // Copyright 2013 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_sent_packet_manager.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 108 matching lines @@
   }
   if (is_server_) {
     if (config.HasReceivedConnectionOptions() &&
         ContainsQuicTag(config.ReceivedConnectionOptions(), kPACE)) {
       EnablePacing();
     }
   } else if (config.HasSendConnectionOptions() &&
              ContainsQuicTag(config.SendConnectionOptions(), kPACE)) {
     EnablePacing();
   }
+  if (is_server_) {
+    if (config.HasReceivedConnectionOptions() &&
+        ContainsQuicTag(config.ReceivedConnectionOptions(), k1CON)) {
+      send_algorithm_->SetNumEmulatedConnections(1);
+    }
+  } else if (config.HasSendConnectionOptions() &&
+             ContainsQuicTag(config.SendConnectionOptions(), k1CON)) {
+    send_algorithm_->SetNumEmulatedConnections(1);
+  }
   // TODO(ianswett): Remove the "HasReceivedLossDetection" branch once
   // the ConnectionOptions code is live everywhere.
   if (config.HasReceivedConnectionOptions() &&
       ContainsQuicTag(config.ReceivedConnectionOptions(), kTIME)) {
     loss_algorithm_.reset(LossDetectionInterface::Create(kTime));
   }
   send_algorithm_->SetFromConfig(config, is_server_);
 
   if (network_change_visitor_ != NULL) {
     network_change_visitor_->OnCongestionWindowChange(GetCongestionWindow());
@@ skipping 730 matching lines @@
 
   // Set up a pacing sender with a 5 millisecond alarm granularity.
   using_pacing_ = true;
   send_algorithm_.reset(
       new PacingSender(send_algorithm_.release(),
                        QuicTime::Delta::FromMilliseconds(5),
                        kInitialUnpacedBurst));
 }
 
 }  // namespace net