[Autofill] Credit Card validation for rAc.

chrome/browser/autofill/validation.h

 // Copyright (c) 2013 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.
 
 #ifndef CHROME_BROWSER_AUTOFILL_VALIDATION_H_
 #define CHROME_BROWSER_AUTOFILL_VALIDATION_H_
 
 #include "base/string16.h"
 
+namespace base {
+
+class Time;
+
+}  // namespace base;
+
 namespace autofill {
 
 // Returns true if |text| looks like a valid credit card number.
 // Uses the Luhn formula to validate the number.
 bool IsValidCreditCardNumber(const string16& text);
 
+// Returns true if |text| is a valid expiration year. Must have |num_digits|
+// digits, and must be |now|'s year or later.
+bool IsValidCreditCardExpirationYear(const string16& text,
+                                     size_t num_digits,
+                                     const base::Time& now);
+
+// Returns true if |text| is a valid expiration date of the form YYYY-MM,
+// MM/YYYY. Number of year digits is determined by |num_digits|. Must be
+// |now|'s month or later.
+bool IsValidCreditCardExpirationDate(const string16& text,
+                                     size_t num_digits,
+                                     const base::Time& now);
+
+// Returns true if |text| looks like a valid CSC.
+bool IsValidCreditCardCSC(const string16& text);
+
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_AUTOFILL_VALIDATION_H_