Print the QuicReceivedPacketManager's ack frame instead of the

net/quic/core/quic_packet_generator.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.
 //
 // Responsible for generating packets on behalf of a QuicConnection.
 // Packets are serialized just-in-time.  Control frames are queued.
 // Ack and Feedback frames will be requested from the Connection
 // just-in-time.  When a packet needs to be sent, the Generator
 // will serialize a packet and pass it to QuicConnection::SendOrQueuePacket()
 //
@@ skipping 163 matching lines @@
 
   // Sets |path_id| to be the path on which next packet is generated.
   void SetCurrentPath(QuicPathId path_id,
                       QuicPacketNumber least_packet_awaited_by_peer,
                       QuicPacketCount max_packets_in_flight);
 
   void set_debug_delegate(QuicPacketCreator::DebugDelegate* debug_delegate) {
     packet_creator_.set_debug_delegate(debug_delegate);
   }
 
-  const QuicAckFrame& pending_ack_frame() const { return pending_ack_frame_; }
-
  private:
   friend class test::QuicPacketGeneratorPeer;
 
   void SendQueuedFrames(bool flush);
 
   // Test to see if we have pending ack, or control frames.
   bool HasPendingFrames() const;
   // Returns true if addition of a pending frame (which might be
   // retransmittable) would still allow the resulting packet to be sent now.
   bool CanSendWithNextPendingFrameAddition() const;
@@ skipping 11 matching lines @@
   // True if batch mode is currently enabled.
   bool batch_mode_;
 
   // Flags to indicate the need for just-in-time construction of a frame.
   bool should_send_ack_;
   bool should_send_stop_waiting_;
   // If we put a non-retransmittable frame in this packet, then we have to hold
   // a reference to it until we flush (and serialize it). Retransmittable frames
   // are referenced elsewhere so that they can later be (optionally)
   // retransmitted.
-  QuicAckFrame pending_ack_frame_;
   QuicStopWaitingFrame pending_stop_waiting_frame_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicPacketGenerator);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_PACKET_GENERATOR_H_