Expose RTT and throughput estimates from Cronet

net/nqe/network_quality.cc

 // Copyright 2016 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/nqe/network_quality.h"
 
 namespace net {
 namespace nqe {
 namespace internal {
 
 base::TimeDelta InvalidRTT() {
-  return base::TimeDelta::Max();
+  return base::TimeDelta::FromMilliseconds(INVALID_RTT_THROUGHPUT);
 }
 
 NetworkQuality::NetworkQuality()
     : NetworkQuality(InvalidRTT(), InvalidRTT(), kInvalidThroughput) {}
 
 NetworkQuality::NetworkQuality(const base::TimeDelta& http_rtt,
                                const base::TimeDelta& transport_rtt,
                                int32_t downstream_throughput_kbps)
     : http_rtt_(http_rtt),
       transport_rtt_(transport_rtt),
       downstream_throughput_kbps_(downstream_throughput_kbps) {
-  DCHECK_GE(downstream_throughput_kbps_, 0);
+  DCHECK_GE(downstream_throughput_kbps_, kInvalidThroughput);
 }
 
 NetworkQuality::NetworkQuality(const NetworkQuality& other)
     : NetworkQuality(other.http_rtt_,
                      other.transport_rtt_,
                      other.downstream_throughput_kbps_) {}
 
 NetworkQuality::~NetworkQuality() {}
 
 NetworkQuality& NetworkQuality::operator=(const NetworkQuality& other) {
@@ skipping 16 matching lines @@
           other.transport_rtt() == InvalidRTT() ||
           transport_rtt() <= other.transport_rtt()) &&
          (downstream_throughput_kbps() == kInvalidThroughput ||
           other.downstream_throughput_kbps() == kInvalidThroughput ||
           downstream_throughput_kbps() >= other.downstream_throughput_kbps());
 }
 
 }  // namespace internal
 }  // namespace nqe
 }  // namespace net