[Autofill] Credit Card Autofill Last Used Date Experiment

chrome/browser/about_flags.cc

 // Copyright (c) 2012 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 "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 652 matching lines @@
      kAutofillCreditCardPopupLayoutFeatureVariationDropdownItemHeight,
      arraysize(
          kAutofillCreditCardPopupLayoutFeatureVariationDropdownItemHeight),
      nullptr},
     {"Display credit card icon at start and increase dropdown item height",
      kAutofillCreditCardPopupLayoutFeatureVariationExpanded,
      arraysize(kAutofillCreditCardPopupLayoutFeatureVariationExpanded),
      nullptr}};
 #endif  // OS_ANDROID
 
+const FeatureEntry::FeatureParam
+    kAutofillCreditCardLastUsedDateFeatureVariationExpDate[] = {
+        {"show_expiration_date", "true"}};
+
+const FeatureEntry::FeatureVariation
+    kAutofillCreditCardLastUsedDateFeatureVariations[] = {
+        {"Display expiration date",
+         kAutofillCreditCardLastUsedDateFeatureVariationExpDate,
+         arraysize(kAutofillCreditCardLastUsedDateFeatureVariationExpDate),
+         nullptr}};
+
 // RECORDING USER METRICS FOR FLAGS:
 // -----------------------------------------------------------------------------
 // The first line of the entry is the internal name.
 //
 // To add a new entry, add to the end of kFeatureEntries. There are two
 // distinct types of entries:
 // . SINGLE_VALUE: entry is either on or off. Use the SINGLE_VALUE_TYPE
 //   macro for this type supplying the command line to the macro.
 // . MULTI_VALUE: a list of choices, the first of which should correspond to a
 //   deactivated state for this lab (i.e. no command line option).  To specify
@@ skipping 1467 matching lines @@
      IDS_FLAGS_ENABLE_EXPANDED_AUTOFILL_CREDIT_CARD_POPUP_LAYOUT,
      IDS_FLAGS_ENABLE_EXPANDED_AUTOFILL_CREDIT_CARD_POPUP_LAYOUT_DESCRIPTION,
      kOsAndroid, FEATURE_WITH_VARIATIONS_VALUE_TYPE(
                      autofill::kAutofillCreditCardPopupLayout,
                      kAutofillCreditCardPopupLayoutFeatureVariations,
                      "AutofillCreditCardPopupLayout")},
     {"native-android-history-manager", IDS_NATIVE_ANDROID_HISTORY_MANAGER,
      IDS_NATIVE_ANDROID_HISTORY_MANAGER_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(features::kNativeAndroidHistoryManager)},
 #endif  // OS_ANDROID
-
+    {"enable-autofill-credit-card-last-used-date-display",
+     IDS_FLAGS_ENABLE_AUTOFILL_CREDIT_CARD_LAST_USED_DATE_DISPLAY,
+     IDS_FLAGS_ENABLE_AUTOFILL_CREDIT_CARD_LAST_USED_DATE_DISPLAY_DESCRIPTION,
+     kOsAll, FEATURE_WITH_VARIATIONS_VALUE_TYPE(
+                 autofill::kAutofillCreditCardLastUsedDateDisplay,
+                 kAutofillCreditCardLastUsedDateFeatureVariations,
+                 "AutofillCreditCardLastUsedDate")},
 #if defined(OS_WIN)
     {"windows10-custom-titlebar", IDS_FLAGS_WINDOWS10_CUSTOM_TITLEBAR_NAME,
      IDS_FLAGS_WINDOWS10_CUSTOM_TITLEBAR_DESCRIPTION, kOsWin,
      SINGLE_VALUE_TYPE(switches::kWindows10CustomTitlebar)},
 #endif  // OS_WIN
 
     {"enable-faster-location-reload", IDS_FLAGS_FASTER_LOCATION_RELOAD_NAME,
      IDS_FLAGS_FASTER_LOCATION_RELOAD_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kFasterLocationReload)},
 #if defined(OS_ANDROID)
@@ skipping 241 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags