Autofill Credit Card Signin Promo: Put behind Feature

components/autofill/core/browser/autofill_experiments.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/core/browser/autofill_experiments.h"
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
 #include "base/metrics/field_trial.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
 #include "components/autofill/core/common/autofill_pref_names.h"
 #include "components/autofill/core/common/autofill_switches.h"
 #include "components/prefs/pref_service.h"
 #include "components/sync_driver/sync_service.h"
+#include "components/variations/variations_associated_data.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 
 namespace autofill {
 
 const base::Feature kAutofillProfileCleanup{"AutofillProfileCleanup",
                                             base::FEATURE_DISABLED_BY_DEFAULT};
+const base::Feature kAutofillCreditCardSigninPromo{
+    "AutofillCreditCardSigninPromo", base::FEATURE_DISABLED_BY_DEFAULT};
+const char kCreditCardSigninPromoImpressionLimitParamKey[] = "impression_limit";
 
 bool IsAutofillEnabled(const PrefService* pref_service) {
   return pref_service->GetBoolean(prefs::kAutofillEnabled);
 }
 
 bool IsInAutofillSuggestionsDisabledExperiment() {
   std::string group_name =
       base::FieldTrialList::FindFullName("AutofillEnabled");
   return group_name == "Disabled";
 }
 
 bool IsAutofillProfileCleanupEnabled() {
   return base::FeatureList::IsEnabled(kAutofillProfileCleanup);
 }
 
+bool IsAutofillCreditCardSigninPromoEnabled() {
+  return base::FeatureList::IsEnabled(kAutofillCreditCardSigninPromo);
+}
+
+int GetCreditCardSigninPromoImpressionLimit() {
+  int impression_limit;
+  std::string param_value = variations::GetVariationParamValueByFeature(
+      kAutofillCreditCardSigninPromo,
+      kCreditCardSigninPromoImpressionLimitParamKey);
+  if (!param_value.empty() && base::StringToInt(param_value, &impression_limit))
+    return impression_limit;
+
+  return 0;
+}
+
 bool OfferStoreUnmaskedCards() {
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   // The checkbox can be forced on with a flag, but by default we don't store
   // on Linux due to lack of system keychain integration. See crbug.com/162735
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableOfferStoreUnmaskedWalletCards);
 #else
   // Query the field trial before checking command line flags to ensure UMA
   // reports the correct group.
   std::string group_name =
@@ skipping 56 matching lines @@
   }
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableOfferUploadCreditCards)) {
     return false;
   }
 
   return !group_name.empty() && group_name != "Disabled";
 }
 
 }  // namespace autofill