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// 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.
#ifndef CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_
#define CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_
namespace user_prefs {
class PrefRegistrySyncable;
}
class PrefService;
class ProfileIOData;
namespace chrome_browser_net {
// Enum describing when to allow network predictions based on connection type.
// The numerical value is stored in the prefs file, therefore the same enum
// with the same order must be used by the platform-dependent components.
enum NetworkPredictionOptions {
NETWORK_PREDICTION_ALWAYS,
NETWORK_PREDICTION_WIFI_ONLY,
NETWORK_PREDICTION_NEVER,
NETWORK_PREDICTION_DEFAULT = NETWORK_PREDICTION_WIFI_ONLY,
};
void RegisterPredictionOptionsProfilePrefs(
user_prefs::PrefRegistrySyncable* registry);
// Migrate prefs::kNetworkPredictionEnabled user setting (if exists) to
// prefs::kNetworkPredictionOptions (if does not have user setting).
void MigrateNetworkPredictionUserPrefs(PrefService* pref_service);
// The following two global functions determine whether prefetching
// and prerendering are enabled, based on preferences and network type.
// To be executed on the IO thread only.
bool CanPrefetchAndPrerenderIO(ProfileIOData* profile_io_data);
// To be executed on the UI thread only.
bool CanPrefetchAndPrerenderUI(PrefService* prefs);
// TODO(bnc): remove the following function as soon as Android Chrome is
// modified to use CanPrefetchAndPrerenderUI instead.
bool CanPredictNetworkActionsUI(PrefService* prefs);
// The following two global functions determine whether TCP preconnect
// and DNS preresolution are enabled, based on preferences.
// To be executed on the IO thread only.
bool CanPreresolveAndPreconnectIO(ProfileIOData* profile_io_data);
// To be executed on the UI thread only.
bool CanPreresolveAndPreconnectUI(PrefService* prefs);
} // namespace chrome_browser_net
#endif // CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_