AutoFill Empty profiles should not be saved from AutoFillDialog Add and Edit sheets on Mac.

chrome/browser/autofill/credit_card.h

Index: chrome/browser/autofill/credit_card.h
diff --git a/chrome/browser/autofill/credit_card.h b/chrome/browser/autofill/credit_card.h
index faf4326b67015348c597ee263f0ebeafa5b13407..85d104f7136c82379ab371a42f90d067602caee3 100644
--- a/chrome/browser/autofill/credit_card.h
+++ b/chrome/browser/autofill/credit_card.h
@@ -59,6 +59,9 @@ class CreditCard : public FormGroup {
   // validate the number.
   static bool IsCreditCardNumber(const string16& text);
 
+  // Returns true if there are no values (field types) set.
+  bool IsEmpty() const;
+
  private:
   // The month and year are zero if not present.
   int Expiration4DigitYear() const { return expiration_year_; }