NQE: Set RTT thresholds for effective connection type of 3G

net/nqe/network_quality_estimator.cc

 // Copyright 2015 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_estimator.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <utility>
@@ skipping 519 matching lines @@
           // Set to 1420 milliseconds, which corresponds to 50th percentile of
           // 2G
           // HTTP RTT observations on Android.
           base::TimeDelta::FromMilliseconds(1420),
           // Set to 1280 milliseconds, which corresponds to 50th percentile of
           // 2G
           // transport RTT observations on Android.
           base::TimeDelta::FromMilliseconds(1280),
           nqe::internal::kInvalidThroughput);
 
+  default_effective_connection_type_thresholds_[EFFECTIVE_CONNECTION_TYPE_3G] =
+      nqe::internal::NetworkQuality(
+          // Set to 273 milliseconds, which corresponds to 50th percentile of
+          // 3G HTTP RTT observations on Android.
+          base::TimeDelta::FromMilliseconds(273),
+          // Set to 204 milliseconds, which corresponds to 50th percentile of
+          // 3G transport RTT observations on Android.
+          base::TimeDelta::FromMilliseconds(204),
+          nqe::internal::kInvalidThroughput);
+
   for (size_t i = 0; i < EFFECTIVE_CONNECTION_TYPE_LAST; ++i) {
     EffectiveConnectionType effective_connection_type =
         static_cast<EffectiveConnectionType>(i);
     DCHECK_EQ(nqe::internal::InvalidRTT(),
               connection_thresholds_[i].http_rtt());
     DCHECK_EQ(nqe::internal::InvalidRTT(),
               connection_thresholds_[i].transport_rtt());
     DCHECK_EQ(nqe::internal::kInvalidThroughput,
               connection_thresholds_[i].downstream_throughput_kbps());
     if (effective_connection_type == EFFECTIVE_CONNECTION_TYPE_UNKNOWN)
@@ skipping 1161 matching lines @@
   if (effective_connection_type_ != EFFECTIVE_CONNECTION_TYPE_UNKNOWN) {
     network_quality_store_->Add(
         current_network_id_,
         nqe::internal::CachedNetworkQuality(
             tick_clock_->NowTicks(), estimated_quality_at_last_main_frame_,
             effective_connection_type_));
   }
 }
 
 }  // namespace net