1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_ 6 #define CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_ 7 8 namespace user_prefs { 9 class PrefRegistrySyncable; 10 } 11 12 class PrefService; 13 class ProfileIOData; 14 15 namespace chrome_browser_net { 16 17 // Enum describing when to allow network predictions based on connection type. 18 // The numerical value is stored in the prefs file, therefore the same enum 19 // with the same order must be used by the platform-dependent components. 20 enum NetworkPredictionOptions { 21 NETWORK_PREDICTION_ALWAYS, 22 NETWORK_PREDICTION_WIFI_ONLY, 23 NETWORK_PREDICTION_NEVER, 24 NETWORK_PREDICTION_DEFAULT = NETWORK_PREDICTION_WIFI_ONLY, 25 }; 26 27 void RegisterPredictionOptionsProfilePrefs( 28 user_prefs::PrefRegistrySyncable* registry); 29 30 // Migrate prefs::kNetworkPredictionEnabled user setting (if exists) to 31 // prefs::kNetworkPredictionOptions (if does not have user setting). 32 void MigrateNetworkPredictionUserPrefs(PrefService* pref_service); 33 34 // The following two global functions determine whether prefetching 35 // and prerendering are enabled, based on preferences and network type. 36 37 // To be executed on the IO thread only. 38 bool CanPrefetchAndPrerenderIO(ProfileIOData* profile_io_data); 39 40 // To be executed on the UI thread only. 41 bool CanPrefetchAndPrerenderUI(PrefService* prefs); 42 43 // The following two global functions determine whether TCP preconnect 44 // and DNS preresolution are enabled, based on preferences. 45 46 // To be executed on the IO thread only. 47 bool CanPreresolveAndPreconnectIO(ProfileIOData* profile_io_data); 48 49 // To be executed on the UI thread only. 50 bool CanPreresolveAndPreconnectUI(PrefService* prefs); 51 52 } // namespace chrome_browser_net 53 54 #endif // CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_ 55
