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 // The following two global functions determine whether prefetching
  31 // and prerendering are enabled, based on preferences and network type.
  32
  33 // To be executed on the IO thread only.
  34 bool CanPrefetchAndPrerenderIO(ProfileIOData* profile_io_data);
  35
  36 // To be executed on the UI thread only.
  37 bool CanPrefetchAndPrerenderUI(PrefService* prefs);
  38
  39 // The following two global functions determine whether TCP preconnect
  40 // and DNS preresolution are enabled, based on preferences.
  41
  42 // To be executed on the IO thread only.
  43 bool CanPreresolveAndPreconnectIO(ProfileIOData* profile_io_data);
  44
  45 // To be executed on the UI thread only.
  46 bool CanPreresolveAndPreconnectUI(PrefService* prefs);
  47
  48 }  // namespace chrome_browser_net
  49
  50 #endif  // CHROME_BROWSER_NET_PREDICTION_OPTIONS_H_