Update from https://crrev.com/304418

net/quic/congestion_control/rtt_stats.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/congestion_control/rtt_stats.h"
 
 #include <complex>  // std::abs
 
 using std::max;
 
@@ skipping 10 matching lines @@
 const float kHalfWindow = 0.5f;
 const float kQuarterWindow = 0.25f;
 
 }  // namespace
 
 RttStats::RttStats()
     : latest_rtt_(QuicTime::Delta::Zero()),
       min_rtt_(QuicTime::Delta::Zero()),
       smoothed_rtt_(QuicTime::Delta::Zero()),
       mean_deviation_(QuicTime::Delta::Zero()),
-      initial_rtt_us_(kInitialRttMs * base::Time::kMicrosecondsPerMillisecond),
+      initial_rtt_us_(kInitialRttMs * kNumMicrosPerMilli),
       num_min_rtt_samples_remaining_(0),
       recent_min_rtt_window_(QuicTime::Delta::Infinite()) {}
 
 void RttStats::SampleNewRecentMinRtt(uint32 num_samples) {
   num_min_rtt_samples_remaining_ = num_samples;
   new_min_rtt_ = RttSample();
 }
 
 void RttStats::ExpireSmoothedMetrics() {
   mean_deviation_ =
@@ skipping 79 matching lines @@
       now.Subtract(recent_min_rtt_window_.Multiply(kHalfWindow))) {
     half_window_rtt_ = quarter_window_rtt_;
     quarter_window_rtt_ = RttSample(rtt_sample, now);
   } else if (quarter_window_rtt_.time <
       now.Subtract(recent_min_rtt_window_.Multiply(kQuarterWindow))) {
     quarter_window_rtt_ = RttSample(rtt_sample, now);
   }
 }
 
 }  // namespace net