chromium/chrome/browser/page_load_metrics/observers/prefetch_page_load_metrics_observer.cc

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/page_load_metrics/observers/prefetch_page_load_metrics_observer.h"

#include <algorithm>

#include "base/metrics/histogram_macros_local.h"
#include "base/strings/string_util.h"
#include "chrome/browser/history/history_service_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "components/history/core/browser/history_service.h"
#include "components/page_load_metrics/browser/page_load_tracker.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/prefetch_metrics.h"
#include "content/public/browser/web_contents.h"
#include "services/metrics/public/cpp/metrics_utils.h"
#include "services/metrics/public/cpp/ukm_builders.h"
#include "services/metrics/public/cpp/ukm_recorder.h"
#include "services/metrics/public/cpp/ukm_source.h"
#include "third_party/blink/public/common/mime_util/mime_util.h"

namespace {

// Yields 10 buckets between 1 and 180 (1,2,3,5,9,15,25,42,70,119), per privacy
// requirements. Computed using:
// CEIL(
//   POW(kDaysSinceLastVisitBucketSpacing,
//       FLOOR(LN(sample) / LN(kDaysSinceLastVisitBucketSpacing)))
// )
const double kDaysSinceLastVisitBucketSpacing = …;

}  // namespace

PrefetchPageLoadMetricsObserver::PrefetchPageLoadMetricsObserver() = default;

PrefetchPageLoadMetricsObserver::~PrefetchPageLoadMetricsObserver() = default;

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PrefetchPageLoadMetricsObserver::OnStart(
    content::NavigationHandle* navigation_handle,
    const GURL& currently_committed_url,
    bool started_in_foreground) { … }

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PrefetchPageLoadMetricsObserver::OnFencedFramesStart(
    content::NavigationHandle* navigation_handle,
    const GURL& currently_committed_url) { … }

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PrefetchPageLoadMetricsObserver::OnPrerenderStart(
    content::NavigationHandle* navigation_handle,
    const GURL& currently_committed_url) { … }

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PrefetchPageLoadMetricsObserver::OnRedirect(
    content::NavigationHandle* navigation_handle) { … }

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PrefetchPageLoadMetricsObserver::OnCommit(
    content::NavigationHandle* navigation_handle) { … }

void PrefetchPageLoadMetricsObserver::OnDidInternalNavigationAbort(
    content::NavigationHandle* navigation_handle) { … }

void PrefetchPageLoadMetricsObserver::OnPrefetchLikely() { … }

void PrefetchPageLoadMetricsObserver::OnOriginLastVisitResult(
    base::Time query_start_time,
    history::HistoryLastVisitResult result) { … }

void PrefetchPageLoadMetricsObserver::RecordMetrics() { … }

void PrefetchPageLoadMetricsObserver::RecordPrefetchProxyEvent() { … }

void PrefetchPageLoadMetricsObserver::RecordAfterPrefetchReferralEvent() { … }

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PrefetchPageLoadMetricsObserver::OnHidden(
    const page_load_metrics::mojom::PageLoadTiming& timing) { … }

page_load_metrics::PageLoadMetricsObserver::ObservePolicy
PrefetchPageLoadMetricsObserver::FlushMetricsOnAppEnterBackground(
    const page_load_metrics::mojom::PageLoadTiming& timing) { … }

void PrefetchPageLoadMetricsObserver::OnComplete(
    const page_load_metrics::mojom::PageLoadTiming& timing) { … }