2 files changed, 29 insertions, 30 deletions
diff --git a/chrome/browser/autofill/credit_card.cc b/chrome/browser/autofill/credit_card.cc
index fefab77..7f41b5e 100644
--- a/chrome/browser/autofill/credit_card.cc
+++ b/chrome/browser/autofill/credit_card.cc
@@ -281,6 +281,31 @@ bool CreditCard::operator!=(const CreditCard& creditcard) const {
   return !operator==(creditcard);
 }
 
+// Use the Luhn formula to validate the number.
+bool CreditCard::IsCreditCardNumber(const string16& text) {
+  string16 number;
+  RemoveChars(text, kCreditCardSeparators.c_str(), &number);
+
+  int sum = 0;
+  bool odd = false;
+  string16::reverse_iterator iter;
+  for (iter = number.rbegin(); iter != number.rend(); ++iter) {
+    if (!IsAsciiDigit(*iter))
+      return false;
+
+    int digit = *iter - '0';
+    if (odd) {
+      digit *= 2;
+      sum += digit / 10 + digit % 10;
+    } else {
+      sum += digit;
+    }
+    odd = !odd;
+  }
+
+  return (sum % 10) == 0;
+}
+
 string16 CreditCard::ExpirationMonthAsString() const {
   if (expiration_month_ == 0)
     return string16();
@@ -409,33 +434,6 @@ bool CreditCard::IsNameOnCard(const string16& text) const {
   return StringToLowerASCII(text) == StringToLowerASCII(name_on_card_);
 }
 
-bool CreditCard::IsCreditCardNumber(const string16& text) {
-  string16 number;
-  TrimString(text, kCreditCardSeparators.c_str(), &number);
-
-  // We use the Luhn formula to validate the number; see
-  // http://www.beachnet.com/~hstiles/cardtype.html and
-  // http://www.webopedia.com/TERM/L/Luhn_formula.html.
-  int sum = 0;
-  bool odd = false;
-  string16::reverse_iterator iter;
-  for (iter = number.rbegin(); iter != number.rend(); ++iter) {
-    if (!IsAsciiDigit(*iter))
-      return false;
-
-    int digit = *iter - '0';
-    if (odd) {
-      digit *= 2;
-      sum += digit / 10 + digit % 10;
-    } else {
-      sum += digit;
-    }
-    odd = !odd;
-  }
-
-  return (sum % 10) == 0;
-}
-
 bool CreditCard::IsVerificationCode(const string16& text) const {
   return StringToLowerASCII(text) == StringToLowerASCII(verification_code_);
 }
diff --git a/chrome/browser/autofill/credit_card.h b/chrome/browser/autofill/credit_card.h
index 4c16ec7..50bfa3a 100644
--- a/chrome/browser/autofill/credit_card.h
+++ b/chrome/browser/autofill/credit_card.h
@@ -58,6 +58,10 @@ class CreditCard : public FormGroup {
   bool operator!=(const CreditCard& creditcard) const;
   void set_label(const string16& label) { label_ = label; }
 
+  // Returns true if |value| is a credit card number.  Uses the Luhn formula to
+  // validate the number.
+  static bool IsCreditCardNumber(const string16& text);
+
  private:
   // The month and year are zero if not present.
   int Expiration4DigitYear() const { return expiration_year_; }
@@ -107,9 +111,6 @@ class CreditCard : public FormGroup {
   // case-insensitive.
   bool IsNameOnCard(const string16& text) const;
 
-  // Uses the Luhn formula to validate the credit card number in |text|.
-  static bool IsCreditCardNumber(const string16& text);
-
   // Returns true if |text| matches the expiration month of the card.
   bool IsExpirationMonth(const string16& text) const;