[Autofill] Don't validate China UnionPay cards with the Luhn checksum.

components/autofill/core/browser/credit_card.cc

Index: components/autofill/core/browser/credit_card.cc
diff --git a/components/autofill/core/browser/credit_card.cc b/components/autofill/core/browser/credit_card.cc
index 9906f27ab6b34a4fc7a3c70827cf0361e0b2c2b2..ca1b20f44cdb9c2857d970a1c300e3a9fa87ce43 100644
--- a/components/autofill/core/browser/credit_card.cc
+++ b/components/autofill/core/browser/credit_card.cc
@@ -151,6 +151,8 @@ base::string16 CreditCard::TypeForDisplay(const std::string& type) {
     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_JCB);
   if (type == kMasterCard)
     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_MASTERCARD);
+  if (type == kUnionPay)
+    return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_UNION_PAY);
   if (type == kVisaCard)
     return l10n_util::GetStringUTF16(IDS_AUTOFILL_CC_VISA);
 
@@ -172,6 +174,8 @@ int CreditCard::IconResourceId(const std::string& type) {
     return IDR_AUTOFILL_CC_JCB;
   if (type == kMasterCard)
     return IDR_AUTOFILL_CC_MASTERCARD;
+  if (type == kUnionPay)
+    return IDR_AUTOFILL_CC_GENERIC;  // Needs resource: http://crbug.com/259211
   if (type == kVisaCard)
     return IDR_AUTOFILL_CC_VISA;
 
@@ -200,6 +204,7 @@ std::string CreditCard::GetCreditCardType(const base::string16& number) {
   // Discover Card          6011,644-649,65                 16
   // JCB                    3528-3589                       16
   // MasterCard             51-55                           16
+  // UnionPay               62                              16

[Albert Bodenhamer, 2013/07/11 16:28:42]

Wikipedia claims 62 or 88 with a length of 16-19
http://en.wikipedia.org/wiki/Bank_card_number.  I'm not sure if there's a better
source.

[Ilya Sherman, 2013/07/12 01:06:47]

AFAICT, 62 is the only prefix that most places tend to check for, but the length
can indeed be up to 19.  I added a few more references for credit card bin
ranges to the docs, and updated the code to support lengths of up to 19.

http://en.unionpay.com/englobalization/all_globzlization/enus/Canada/file_429...
sez "It is recommended to use a “62” UnionPay card."

 
   // Check for prefixes of length 1.
   if (number.empty())
@@ -227,6 +232,9 @@ std::string CreditCard::GetCreditCardType(const base::string16& number) {
   if (first_two_digits >= 51 && first_two_digits <= 55)
     return kMasterCard;
 
+  if (first_two_digits == 62)
+    return kUnionPay;
+
   if (first_two_digits == 65)
     return kDiscoverCard;
 
@@ -692,6 +700,7 @@ const char* const kDiscoverCard = "discoverCC";
 const char* const kGenericCard = "genericCC";
 const char* const kJCBCard = "jcbCC";
 const char* const kMasterCard = "masterCardCC";
+const char* const kUnionPay = "unionPayCC";
 const char* const kVisaCard = "visaCC";
 
 }  // namespace autofill