Add support for Brazil Elo card in autofill.

components/autofill/core/browser/validation.cc

 // Copyright 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.
 
 #include "components/autofill/core/browser/validation.h"
 
 #include <stddef.h>
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 28 matching lines @@
 
   if (year == now_exploded.year && month < now_exploded.month)
     return false;
 
   return true;
 }
 
 bool IsValidCreditCardNumber(const base::string16& text) {
   base::string16 number = CreditCard::StripSeparators(text);
 
-  // Credit card numbers are at most 19 digits in length [1]. 12 digits seems to
-  // be a fairly safe lower-bound [2].  Specific card issuers have more rigidly
-  // defined sizes.
-  // [1] http://www.merriampark.com/anatomycc.htm
-  // [2] http://en.wikipedia.org/wiki/Bank_card_number
+  // Credit card numbers are at most 19 digits in length, 12 digits seems to
+  // be a fairly safe lower-bound [1].  Specific card issuers have more rigidly
+  // defined sizes. 
+  // (Last updated: May 29, 2017)
+  // [1] https://en.wikipedia.org/wiki/Payment_card_number.
   // CardEditor.isCardNumberLengthMaxium() needs to be kept in sync.
   const char* const type = CreditCard::GetCardNetwork(text);
   if (type == kAmericanExpressCard && number.size() != 15)
     return false;
   if (type == kDinersCard && number.size() != 14)
     return false;
   if (type == kDiscoverCard && number.size() != 16)
     return false;
+  if (type == kEloCard && number.size() != 16)
+    return false;
   if (type == kJCBCard && number.size() != 16)
     return false;
   if (type == kMasterCard && number.size() != 16)
     return false;
   if (type == kMirCard && number.size() != 16)
     return false;
   if (type == kUnionPay && (number.size() < 16 || number.size() > 19))
     return false;
-  if (type == kVisaCard && number.size() != 13 && number.size() != 16)
+  if (type == kVisaCard && number.size() != 13 && number.size() != 16 &&
+      number.size() != 19)
     return false;
   if (type == kGenericCard && (number.size() < 12 || number.size() > 19))
     return false;
 
   // Use the Luhn formula [3] to validate the number.
   // [3] http://en.wikipedia.org/wiki/Luhn_algorithm
   int sum = 0;
   bool odd = false;
   for (base::string16::reverse_iterator iter = number.rbegin();
        iter != number.rend();
@@ skipping 295 matching lines @@
     return AMEX_CVC_LENGTH;
 
   return GENERAL_CVC_LENGTH;
 }
 
 bool IsUPIVirtualPaymentAddress(const base::string16& value) {
   return MatchesPattern(value, base::ASCIIToUTF16(kUPIVirtualPaymentAddressRe));
 }
 
 }  // namespace autofill