Update from chromium https://crrev.com/302282

net/quic/quic_bandwidth.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_bandwidth.h"
 
 #include "base/logging.h"
 #include "base/time/time.h"
 
 namespace net {
@@ skipping 82 matching lines @@
 
 QuicBandwidth QuicBandwidth::Subtract(const QuicBandwidth& delta) const {
   return QuicBandwidth(bits_per_second_ - delta.bits_per_second_);
 }
 
 QuicBandwidth QuicBandwidth::Scale(float scale_factor) const {
   return QuicBandwidth(bits_per_second_ * scale_factor);
 }
 
 QuicTime::Delta QuicBandwidth::TransferTime(QuicByteCount bytes) const {
+  if (bits_per_second_ == 0) {
+    return QuicTime::Delta::Zero();
+  }
   return QuicTime::Delta::FromMicroseconds(
       bytes * 8 * base::Time::kMicrosecondsPerSecond / bits_per_second_);
 }
 
 }  // namespace net