Expose RTT and throughput estimates from Cronet

components/cronet/android/cronet_url_request_context_adapter.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 "components/cronet/android/cronet_url_request_context_adapter.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 409 matching lines @@
   DCHECK(GetNetworkTaskRunner()->BelongsToCurrentThread());
 
   if (http_server_properties_manager_)
     http_server_properties_manager_->ShutdownOnPrefThread();
   if (pref_service_)
     pref_service_->CommitPendingWrite();
   if (network_quality_estimator_) {
     network_quality_estimator_->RemoveRTTObserver(this);
     network_quality_estimator_->RemoveThroughputObserver(this);
     network_quality_estimator_->RemoveEffectiveConnectionTypeObserver(this);
+    network_quality_estimator_->RemoveRTTAndThroughputEstimatesObserver(this);
   }
 
   // Stop NetLog observer if there is one.
   StopNetLogHelper();
 }
 
 void CronetURLRequestContextAdapter::InitRequestContextOnMainThread(
     JNIEnv* env,
     const JavaParamRef<jobject>& jcaller) {
   base::android::ScopedJavaGlobalRef<jobject> jcaller_ref;
@@ skipping 179 matching lines @@
     variation_params["effective_connection_type_algorithm"] =
         "TransportRTTOrDownstreamThroughput";
     network_quality_estimator_.reset(new net::NetworkQualityEstimator(
         std::unique_ptr<net::ExternalEstimateProvider>(), variation_params,
         false, false));
     // Set the socket performance watcher factory so that network quality
     // estimator is notified of socket performance metrics from TCP and QUIC.
     context_builder.set_socket_performance_watcher_factory(
         network_quality_estimator_->GetSocketPerformanceWatcherFactory());
     network_quality_estimator_->AddEffectiveConnectionTypeObserver(this);
+    network_quality_estimator_->AddRTTAndThroughputEstimatesObserver(this);
   }
 
   context_ = context_builder.Build();
   if (network_quality_estimator_)
     context_->set_network_quality_estimator(network_quality_estimator_.get());
 
   if (config->load_disable_cache)
     default_load_flags_ |= net::LOAD_DISABLE_CACHE;
 
   if (config->enable_sdch) {
@@ skipping 225 matching lines @@
 }
 
 void CronetURLRequestContextAdapter::OnEffectiveConnectionTypeChanged(
     net::EffectiveConnectionType effective_connection_type) {
   DCHECK(GetNetworkTaskRunner()->BelongsToCurrentThread());
   Java_CronetUrlRequestContext_onEffectiveConnectionTypeChanged(
       base::android::AttachCurrentThread(), jcronet_url_request_context_.obj(),
       effective_connection_type);
 }
 
+void CronetURLRequestContextAdapter::OnRTTOrThroughputEstimatesComputed(
+    base::TimeDelta http_rtt,
+    base::TimeDelta transport_rtt,
+    int32_t downstream_throughput_kbps) {
+  DCHECK(GetNetworkTaskRunner()->BelongsToCurrentThread());
+
+  int32_t http_rtt_ms = http_rtt.InMilliseconds() <= INT32_MAX
+                            ? static_cast<int32_t>(http_rtt.InMilliseconds())
+                            : INT32_MAX;
+  int32_t transport_rtt_ms =
+      transport_rtt.InMilliseconds() <= INT32_MAX
+          ? static_cast<int32_t>(transport_rtt.InMilliseconds())
+          : INT32_MAX;
+
+  Java_CronetUrlRequestContext_onRTTOrThroughputEstimatesComputed(
+      base::android::AttachCurrentThread(), jcronet_url_request_context_.obj(),
+      http_rtt_ms, transport_rtt_ms, downstream_throughput_kbps);
+}
+
 void CronetURLRequestContextAdapter::OnRTTObservation(
     int32_t rtt_ms,
     const base::TimeTicks& timestamp,
     net::NetworkQualityObservationSource source) {
   Java_CronetUrlRequestContext_onRttObservation(
       base::android::AttachCurrentThread(), jcronet_url_request_context_,
       rtt_ms, (timestamp - base::TimeTicks::UnixEpoch()).InMilliseconds(),
       source);
 }
 
@@ skipping 189 matching lines @@
     JNIEnv* env,
     const JavaParamRef<jclass>& jcaller) {
   base::StatisticsRecorder::Initialize();
   std::vector<uint8_t> data;
   if (!HistogramManager::GetInstance()->GetDeltas(&data))
     return ScopedJavaLocalRef<jbyteArray>();
   return base::android::ToJavaByteArray(env, &data[0], data.size());
 }
 
 }  // namespace cronet