chrome/browser/prerender/prerender_field_trial.h

   1 // Copyright (c) 2012 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_PRERENDER_PRERENDER_FIELD_TRIAL_H_
   6 #define CHROME_BROWSER_PRERENDER_PRERENDER_FIELD_TRIAL_H_
   7
   8 #include <string>
   9
  10 class Profile;
  11
  12 namespace base {
  13 class CommandLine;
  14 }
  15
  16 namespace prerender {
  17
  18 // Parse the --prerender= command line switch, which controls prerendering. If
  19 // the switch is unset or is set to "auto" then the user is assigned to a
  20 // field trial.
  21 void ConfigurePrerender(const base::CommandLine& command_line);
  22
  23 // Returns true if the user has opted in or has been opted in to the
  24 // prerendering from Omnibox experiment.
  25 bool IsOmniboxEnabled(Profile* profile);
  26
  27 // Returns true if session storage namespace merging is not disabled.
  28 bool ShouldMergeSessionStorageNamespaces();
  29
  30 // Returns true iff the Prerender Local Predictor is enabled.
  31 bool IsLocalPredictorEnabled();
  32
  33 // Indicates whether to disable the local predictor due to unencrypted sync
  34 // settings and configuration.
  35 bool ShouldDisableLocalPredictorBasedOnSyncAndConfiguration(Profile* profile);
  36
  37 // Returns whether or not the local predictor is temporarily disabled, due
  38 // to network predictive action settings and current network.
  39 bool ShouldDisableLocalPredictorDueToPreferencesAndNetwork(Profile* profile);
  40
  41 // Returns true iff the LoggedIn Predictor is enabled.
  42 bool IsLoggedInPredictorEnabled();
  43
  44 // Returns true iff the side-effect free whitelist is enabled.
  45 bool IsSideEffectFreeWhitelistEnabled();
  46
  47 // Returns true if the local predictor should actually launch prerenders.
  48 bool IsLocalPredictorPrerenderLaunchEnabled();
  49
  50 // Returns true if the local predictor should prerender, but only as control
  51 // group. If the local predictor never launches prerenders, then this setting
  52 // is irrelevant.
  53 bool IsLocalPredictorPrerenderAlwaysControlEnabled();
  54
  55 // Returns true if the local predictor should prefetch rather than prerender.
  56 bool IsLocalPredictorPrerenderPrefetchEnabled();
  57
  58 // Returns true if we should query the prerender service for the profile
  59 // provided.
  60 bool ShouldQueryPrerenderService(Profile* profile);
  61
  62 // Indicates whether we should query the prerender service for the current URL
  63 // and candidate URLs, respectively.
  64 bool ShouldQueryPrerenderServiceForCurrentURL();
  65 bool ShouldQueryPrerenderServiceForCandidateURLs();
  66
  67 // Returns the URL prefix to be used for the prerender service. The only thing
  68 // that will be appended is the urlencoded query json.
  69 std::string GetPrerenderServiceURLPrefix();
  70
  71 // Returns the prerender service behavior ID that should be passed to the
  72 // to the prerender service in requests.
  73 int GetPrerenderServiceBehaviorID();
  74
  75 // Returns the fetch timeout to be used for the prerender service, in ms.
  76 int GetPrerenderServiceFetchTimeoutMs();
  77
  78 // Returns the timeout for entries in the prefetch list, in seconds.
  79 int GetPrerenderPrefetchListTimeoutSeconds();
  80
  81 // Returns the TTL to be used for the local predictor.
  82 int GetLocalPredictorTTLSeconds();
  83
  84 // Returns the half-life time to use to decay local predictor prerender
  85 // priorities.
  86 int GetLocalPredictorPrerenderPriorityHalfLifeTimeSeconds();
  87
  88 // Returns the maximum number of concurrent prerenders the local predictor
  89 // may maintain.
  90 int GetLocalPredictorMaxConcurrentPrerenders();
  91
  92 // Returns the maximum number of concurrent prerenders the local predictor
  93 // may launch concurrently.
  94 int GetLocalPredictorMaxLaunchPrerenders();
  95
  96 // The following functions return whether certain LocalPredictor checks should
  97 // be skipped, as indicated by the name.
  98 bool SkipLocalPredictorFragment();
  99 bool SkipLocalPredictorHTTPS();
 100 bool SkipLocalPredictorWhitelist();
 101 bool SkipLocalPredictorServiceWhitelist();
 102 bool SkipLocalPredictorLoggedIn();
 103 bool SkipLocalPredictorDefaultNoPrerender();
 104 bool SkipLocalPredictorLocalCandidates();
 105 bool SkipLocalPredictorServiceCandidates();
 106
 107 // Indicates whether no prerender cookie stores should be used for prerendering.
 108 bool IsPrerenderCookieStoreEnabled();
 109
 110 }  // namespace prerender
 111
 112 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_FIELD_TRIAL_H_