Fixes two div by zero bugs in QUIC's BBR pacing code that caused server

net/quic/quic_server_session.cc

 // Copyright 2014 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_server_session.h"
 
 #include "base/logging.h"
 #include "net/quic/crypto/source_address_token.h"
 #include "net/quic/quic_connection.h"
 #include "net/quic/quic_flags.h"
@@ skipping 104 matching lines @@
 
   // Fill the proto before passing it to the crypto stream to send.
   CachedNetworkParameters cached_network_params;
   cached_network_params.set_bandwidth_estimate_bytes_per_second(
       bandwidth_estimate_sent_to_client_.ToBytesPerSecond());
   cached_network_params.set_max_bandwidth_estimate_bytes_per_second(
       max_bandwidth_estimate.ToBytesPerSecond());
   cached_network_params.set_max_bandwidth_timestamp_seconds(
       max_bandwidth_timestamp);
   cached_network_params.set_min_rtt_ms(
-      sent_packet_manager.GetRttStats()->min_rtt().ToMilliseconds());
+      sent_packet_manager.GetRttStats()->MinRtt().ToMilliseconds());
   cached_network_params.set_previous_connection_state(
       bandwidth_recorder.EstimateRecordedDuringSlowStart()
           ? CachedNetworkParameters::SLOW_START
           : CachedNetworkParameters::CONGESTION_AVOIDANCE);
   cached_network_params.set_timestamp(
       connection()->clock()->WallNow().ToUNIXSeconds());
   if (!serving_region_.empty()) {
     cached_network_params.set_serving_region(serving_region_);
   }
 
@@ skipping 29 matching lines @@
 QuicDataStream* QuicServerSession::CreateOutgoingDataStream() {
   DLOG(ERROR) << "Server push not yet supported";
   return nullptr;
 }
 
 QuicCryptoServerStream* QuicServerSession::GetCryptoStream() {
   return crypto_stream_.get();
 }
 
 }  // namespace net