[Autofill] Require callers to pass in locale when parsing named months like "January"

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 6a37438b60a3a13508f7db176efe16d70a03e1d7..c4987d75a0945832786d4144f7631f07ff43e8ef 100644
--- a/chrome/browser/autofill/credit_card.h
+++ b/chrome/browser/autofill/credit_card.h
@@ -106,7 +106,8 @@ class CreditCard : public FormGroup {
   string16 Expiration2DigitYearAsString() const;
 
   // Sets |expiration_month_| to the integer conversion of |text|.
-  void SetExpirationMonthFromString(const string16& text);
+  void SetExpirationMonthFromString(const string16& text,
+                                    const std::string& app_locale);
 
   // Sets |expiration_year_| to the integer conversion of |text|.
   void SetExpirationYearFromString(const string16& text);