[Payments] Normalize Shipping Address sent to merchant on Desktop.

components/autofill/core/browser/autofill_data_util.cc

Index: components/autofill/core/browser/autofill_data_util.cc
diff --git a/components/autofill/core/browser/autofill_data_util.cc b/components/autofill/core/browser/autofill_data_util.cc
index f55ec9068c50c8a04a02587a1910cff55dea3ced..d7fff0d9e486cec37aa8f6ea20da0641c17f6eb2 100644
--- a/components/autofill/core/browser/autofill_data_util.cc
+++ b/components/autofill/core/browser/autofill_data_util.cc
@@ -14,6 +14,7 @@
 #include "components/autofill/core/browser/field_types.h"
 #include "components/grit/components_scaled_resources.h"
 #include "third_party/icu/source/common/unicode/uscript.h"
+#include "third_party/re2/src/re2/re2.h"
 
 namespace autofill {
 namespace data_util {
@@ -419,5 +420,16 @@ const char* GetCardTypeForBasicCardPaymentType(
   return kGenericPaymentRequestData.card_type;
 }
 
+bool IsValidCountryCode(const std::string& country_code) {
+  if (country_code.size() != 2)
+    return false;
+
+  return re2::RE2::FullMatch(country_code, "^[A-Z]{2}$");
+}
+
+bool IsValidCountryCode(const base::string16& country_code) {
+  return IsValidCountryCode(base::UTF16ToUTF8(country_code));
+}
+
 }  // namespace data_util
 }  // namespace autofill