chrome/browser/ui/passwords/password_bubble_experiment.cc

   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 #include "chrome/browser/ui/passwords/password_bubble_experiment.h"
   6
   7 #include "base/metrics/field_trial.h"
   8 #include "base/prefs/pref_service.h"
   9 #include "base/strings/string_number_conversions.h"
  10 #include "chrome/common/pref_names.h"
  11 #include "components/pref_registry/pref_registry_syncable.h"
  12 #include "components/variations/variations_associated_data.h"
  13
  14 namespace password_bubble_experiment {
  15 namespace {
  16
  17 // Return the number of consecutive times the user clicked "Not now" in the
  18 // "Save password" bubble.
  19 int GetCurrentNopesCount(PrefService* prefs) {
  20   return prefs->GetInteger(prefs::kPasswordBubbleNopesCount);
  21 }
  22
  23 } // namespace
  24
  25 const char kExperimentName[] = "PasswordBubbleAlgorithm";
  26 const char kParamNopeThreshold[] = "consecutive_nope_threshold";
  27
  28 void RegisterPrefs(user_prefs::PrefRegistrySyncable* registry) {
  29   registry->RegisterIntegerPref(
  30       prefs::kPasswordBubbleNopesCount,
  31       0,
  32       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
  33 }
  34
  35 bool ShouldShowNeverForThisSiteDefault(PrefService* prefs) {
  36   if (!base::FieldTrialList::TrialExists(kExperimentName))
  37     return false;
  38   std::string param =
  39       variations::GetVariationParamValue(kExperimentName, kParamNopeThreshold);
  40
  41   int threshold = 0;
  42   return base::StringToInt(param, &threshold) &&
  43       GetCurrentNopesCount(prefs) >= threshold;
  44 }
  45
  46 void RecordBubbleClosed(
  47     PrefService* prefs,
  48     password_manager::metrics_util::UIDismissalReason reason) {
  49   // Clicking "Never" doesn't change the experiment state.
  50   if (reason == password_manager::metrics_util::CLICKED_NEVER)
  51     return;
  52   int nopes_count = GetCurrentNopesCount(prefs);
  53   if (reason == password_manager::metrics_util::CLICKED_NOPE)
  54     nopes_count++;
  55   else
  56     nopes_count = 0;
  57   prefs->SetInteger(prefs::kPasswordBubbleNopesCount, nopes_count);
  58 }
  59
  60 }  // namespace password_bubble_experiment