chromium/chrome/browser/predictors/predictors_features.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/predictors/predictors_features.h"

#include "base/metrics/field_trial_params.h"
#include "build/build_config.h"

namespace features {

namespace {

constexpr base::FeatureState kFeatureEnabledOnlyOnAndroid = …;

}  // namespace

// Whether local predictions should be used to make preconnect predictions.
BASE_FEATURE(…);

// Modifies loading predictor so that it only learns about subresources and
// origins that are high priority.
BASE_FEATURE(…);

// Configures the loading predictor table size and other base parameters.
BASE_FEATURE(…);

// Modifies loading predictor so that the predictions also contain origins of
// the redirect target of the navigation.
BASE_FEATURE(…);

// Modifies loading predictor so that the value of the |always_access_network|
// attribute is not used when computing the predicting score for an origin.
BASE_FEATURE(…);

constexpr base::FeatureState
    kLoadingPredictorUseOptimizationGuideDefaultFeatureState = …;

// Modifies loading predictor so that it can also use predictions coming from
// the optimization guide.
BASE_FEATURE(…);

constexpr base::FeatureState kLoadingPredictorPrefetchDefaultFeatureState = …;

// Modifies loading predictor so that it does prefetches of subresources instead
// of preconnects.
BASE_FEATURE(…);

// Use the kURLLoadOptionReadAndDiscardBody option to URLLoader to avoid
// unnecessarily copying response body data.
BASE_FEATURE(…);

const base::FeatureParam<PrefetchSubresourceType>::Option
    kPrefetchSubresourceTypeParamOptions[] = …;

const base::FeatureParam<PrefetchSubresourceType>
    kLoadingPredictorPrefetchSubresourceType{ … };

BASE_FEATURE(…);

bool ShouldUseLocalPredictions() { … }

bool ShouldUseOptimizationGuidePredictions() { … }

bool ShouldAlwaysRetrieveOptimizationGuidePredictions() { … }

size_t GetMaxInflightPrefetches() { … }

// If this is enabled, LoadingPredictor avoids prefetching during
// browser startup.
BASE_FEATURE(…);

// If this is enabled, LoadingPredictor restricts the number of preconnects for
// the same destination to one.
BASE_FEATURE(…);

}  // namespace features