[Payments] Basic validation in the credit card editor.

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..47d06f1813afca09075e2320286834da70f425be 100644
--- a/components/autofill/core/browser/credit_card.h
+++ b/components/autofill/core/browser/credit_card.h
@@ -196,6 +196,20 @@ class CreditCard : public AutofillDataModel {
     billing_address_id_ = id;
   }
 
+  // Sets |expiration_month_| to the integer conversion of |text| and returns
+  // whether the operation was successful.
+  bool SetExpirationMonthFromString(const base::string16& text,
+                                    const std::string& app_locale);
+
+  // Sets |expiration_year_| to the integer conversion of |text|. Will handle
+  // 4-digit year or 2-digit year (eventually converted to 4-digit year).
+  void SetExpirationYearFromString(const base::string16& text);
+
+  // Sets |expiration_year_| and |expiration_month_| to the integer conversion
+  // of |text|. Will handle mmyy, mmyyyy, mm-yyyy and mm-yy as well as single
+  // digit months, with various separators.
+  void SetExpirationDateFromString(const base::string16& text);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(CreditCardTest, SetExpirationDateFromString);
   FRIEND_TEST_ALL_PREFIXES(CreditCardTest, SetExpirationYearFromString);
@@ -213,20 +227,6 @@ class CreditCard : public AutofillDataModel {
   base::string16 Expiration4DigitYearAsString() const;
   base::string16 Expiration2DigitYearAsString() const;
 
-  // Sets |expiration_month_| to the integer conversion of |text| and returns
-  // whether the operation was successful.
-  bool SetExpirationMonthFromString(const base::string16& text,
-                                    const std::string& app_locale);
-
-  // Sets |expiration_year_| to the integer conversion of |text|. Will handle
-  // 4-digit year or 2-digit year (eventually converted to 4-digit year).
-  void SetExpirationYearFromString(const base::string16& text);
-
-  // Sets |expiration_year_| and |expiration_month_| to the integer conversion
-  // of |text|. Will handle mmyy, mmyyyy, mm-yyyy and mm-yy as well as single
-  // digit months, with various separators.
-  void SetExpirationDateFromString(const base::string16& text);
-
   // See enum definition above.
   RecordType record_type_;