blob: d70955e37c87435b0c52e239301d4f283d7ed19c [file] [log] [blame]
// Copyright 2017 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 <cstddef>
#include "base/feature_list.h"
class Profile;
namespace predictors {
extern const char kSpeculativePreconnectFeatureName[];
extern const base::Feature kSpeculativePreconnectFeature;
// Returns whether the speculative preconnect feature is enabled.
bool IsPreconnectFeatureEnabled();
// Returns whether the Loading Predictor is enabled for the given |profile|. If
// true, the predictor can observe page load events, build historical database
// and perform allowed speculative actions based on this database.
bool IsLoadingPredictorEnabled(Profile* profile);
// Returns whether the current |profile| settings allow to perform preresolve
// and preconnect actions. This setting is controlled by the user, so the return
// value shouldn't be cached.
bool IsPreconnectAllowed(Profile* profile);
// Indicates what caused the page load hint.
enum class HintOrigin {
// Triggered at the start of each navigation.
// Used when a preconnect is triggered by an external Android app.
// Triggered by omnibox.
// Triggered by navigation predictor service.
// Used when a prerender initiated by Omnibox is unsuccessful, and instead a
// preconnect is initiated. Preconnect triggered by
// OMNIBOX_PRERENDER_FALLBACK may be handled differently than preconnects
// triggered by OMNIBOX since the former are triggered at higher confidence.
// Represents the config for the Loading predictor.
struct LoadingPredictorConfig {
// Initializes the config with default values.
LoadingPredictorConfig(const LoadingPredictorConfig& other);
bool IsSmallDBEnabledForTest() const;
// If a navigation hasn't seen a load complete event in this much time, it
// is considered abandoned.
size_t max_navigation_lifetime_seconds;
// Size of LRU caches for the host data.
size_t max_hosts_to_track;
// The maximum number of origins to store per entry.
size_t max_origins_per_entry;
// The number of consecutive misses after which we stop tracking a resource
// URL.
size_t max_consecutive_misses;
// The number of consecutive misses after which we stop tracking a redirect
// endpoint.
size_t max_redirect_consecutive_misses;
// Delay between writing data to the predictors database memory cache and
// flushing it to disk.
size_t flush_data_to_disk_delay_seconds;
} // namespace predictors