[Autofill] Credit Card Autofill Last Used Date Experiment

components/autofill/core/browser/credit_card.h

Index: components/autofill/core/browser/credit_card.h
diff --git a/components/autofill/core/browser/credit_card.h b/components/autofill/core/browser/credit_card.h
index d0a8a6eee7ee8b3b720d6e44035359baee0be127..c20216c506a48df5e7dad7766da53704db404ef4 100644
--- a/components/autofill/core/browser/credit_card.h
+++ b/components/autofill/core/browser/credit_card.h
@@ -174,8 +174,14 @@ class CreditCard : public AutofillDataModel {
   // Sets |number_| to |number| and computes the appropriate card |type_|.
   void SetNumber(const base::string16& number);
 
-  // Logs the number of days since the credit card was last used and records its
-  // use.
+  // Returns the date when the credit card was last used in autofill, show
+  // expiration date if |show_expiration_date| is true, and show time detail
+  // if |show_time_detail| is true.
+  base::string16 GetLastUsedDateForDisplay(bool show_expiration_date,
+                                           bool show_time_detail) const;
+
+  // Logs the number of days since the credit card was last used and records
+  // its use.
   void RecordAndLogUse();
 
   // Converts a string representation of a month (such as "February" or "feb."
@@ -185,6 +191,9 @@ class CreditCard : public AutofillDataModel {
                            const std::string& app_locale,
                            int* num);
 
+  base::string16 GetShortMonthLabel(int32_t zero_base_month_index,
+                                    const std::string& app_locale) const;
+
   // Returns whether the credit card is expired based on |current_time|.
   bool IsExpired(const base::Time& current_time) const;