Remove the (now-empty) sent_info field when logging QUIC ack frames.

net/quic/quic_connection_logger.cc

 // Copyright (c) 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_connection_logger.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 84 matching lines @@
   dict->SetInteger("stream_id", frame->stream_id);
   dict->SetBoolean("fin", frame->fin);
   dict->SetString("offset", base::Uint64ToString(frame->offset));
   dict->SetInteger("length", frame->data.TotalBufferSize());
   return dict;
 }
 
 base::Value* NetLogQuicAckFrameCallback(const QuicAckFrame* frame,
                                         NetLog::LogLevel /* log_level */) {
   base::DictionaryValue* dict = new base::DictionaryValue();
-  base::DictionaryValue* sent_info = new base::DictionaryValue();
-  dict->Set("sent_info", sent_info);
-  sent_info->SetString("least_unacked",
-                       base::Uint64ToString(frame->sent_info.least_unacked));
   base::DictionaryValue* received_info = new base::DictionaryValue();
   dict->Set("received_info", received_info);
   received_info->SetString(
       "largest_observed",
       base::Uint64ToString(frame->received_info.largest_observed));
   received_info->SetBoolean("truncated", frame->received_info.is_truncated);
   base::ListValue* missing = new base::ListValue();
   received_info->Set("missing_packets", missing);
   const SequenceNumberSet& missing_packets =
       frame->received_info.missing_packets;
@@ skipping 713 matching lines @@
       continue;
     }
     // Record some overlapping patterns, to get a better picture, since this is
     // not very expensive.
     if (i % 3 == 0)
       six_packet_histogram->Add(recent_6_mask);
   }
 }
 
 }  // namespace net