Add an IncreaseLargestObserved to QuicUnackedPacketMap to remove the rtt

net/quic/quic_connection.cc

 // 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.
 
 #include "net/quic/quic_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 #include <algorithm>
 #include <iterator>
@@ skipping 1448 matching lines @@
              << sequence_number << " since the connection is forward secure.";
     LOG_IF(DFATAL,
            sent_packet_manager_.HasRetransmittableFrames(sequence_number))
         << "Once forward secure, all NULL encrypted packets should be "
         << "neutered.";
     return true;
   }
 
   if (retransmittable == HAS_RETRANSMITTABLE_DATA &&
       !sent_packet_manager_.HasRetransmittableFrames(sequence_number)) {
-    LOG(DFATAL) << ENDPOINT << "Dropping unacked packet: " << sequence_number
-                << " This should have been removed when it was Neutered.";
+    DVLOG(1) << ENDPOINT << "Dropping unacked packet: " << sequence_number
+             << " A previous transmission was acked while write blocked.";
     return true;
   }
 
   return false;
 }
 
 bool QuicConnection::OnPacketSent(WriteResult result) {
   DCHECK_NE(WRITE_STATUS_BLOCKED, result.status);
   if (pending_write_.get() == NULL) {
     LOG(DFATAL) << "OnPacketSent called without a pending write.";
@@ skipping 484 matching lines @@
   // If we changed the generator's batch state, restore original batch state.
   if (!already_in_batch_mode_) {
     DVLOG(1) << "Leaving Batch Mode.";
     connection_->packet_generator_.FinishBatchOperations();
   }
   DCHECK_EQ(already_in_batch_mode_,
             connection_->packet_generator_.InBatchMode());
 }
 
 }  // namespace net