chrome/browser/net/prediction_options.h

   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_