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

Review URL: https://codereview.chromium.org/348553004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278834 0039d316-1c4b-4281-b951-d872f2087c98

net/quic/quic_connection_logger.cc

@@ -102,10 +102,6 @@ base::Value* NetLogQuicStreamFrameCallback(const QuicStreamFrame* frame,
 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(