chromium/content/browser/network/network_quality_observer_impl.cc

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/network/network_quality_observer_impl.h"

#include "base/metrics/histogram_macros.h"
#include "content/common/renderer.mojom.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/network_quality_observer_factory.h"
#include "content/public/browser/render_process_host.h"

namespace {

// Returns true if the |current_value| is meaningfully different from the
// |past_value|. May be called with either RTT or throughput values to compare.
bool MetricChangedMeaningfully(int32_t past_value, int32_t current_value) { … }

}  // namespace

namespace content {

NetworkQualityObserverImpl::NetworkQualityObserverImpl(
    network::NetworkQualityTracker* network_quality_tracker)
    : … { … }

NetworkQualityObserverImpl::~NetworkQualityObserverImpl() { … }

void NetworkQualityObserverImpl::OnEffectiveConnectionTypeChanged(
    net::EffectiveConnectionType type) { … }

void NetworkQualityObserverImpl::OnRenderProcessHostCreated(
    content::RenderProcessHost* rph) { … }

void NetworkQualityObserverImpl::OnRTTOrThroughputEstimatesComputed(
    base::TimeDelta http_rtt,
    base::TimeDelta transport_rtt,
    int32_t downstream_throughput_kbps) { … }

std::unique_ptr<
    network::NetworkQualityTracker::RTTAndThroughputEstimatesObserver>
CreateNetworkQualityObserver(
    network::NetworkQualityTracker* network_quality_tracker) { … }

}  // namespace content