Print the QuicReceivedPacketManager's ack frame instead of the

net/quic/core/quic_connection.h

 // 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.
 //
 // The entity that handles framing writes for a Quic client or server.
 // Each QuicSession will have a connection associated with it.
 //
 // On the server side, the Dispatcher handles the raw reads, and hands off
 // packets via ProcessUdpPacket for framing and processing.
 //
@@ skipping 668 matching lines @@
 
   QuicConnectionHelperInterface* helper() { return helper_; }
   QuicAlarmFactory* alarm_factory() { return alarm_factory_; }
 
   base::StringPiece GetCurrentPacket();
 
   const QuicPacketGenerator& packet_generator() const {
     return packet_generator_;
   }
 
+  const QuicReceivedPacketManager& received_packet_manager() const {
+    return received_packet_manager_;
+  }
+
   EncryptionLevel encryption_level() const { return encryption_level_; }
 
   const IPEndPoint& last_packet_source_address() const {
     return last_packet_source_address_;
   }
 
   void set_largest_packet_size_supported(QuicByteCount size) {
     largest_packet_size_supported_ = size;
   }
 
@@ skipping 404 matching lines @@
   // Indicates whether a write error is encountered currently. This is used to
   // avoid infinite write errors.
   bool write_error_occured_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_H_