Modify error messages for payment address validation as per specification.

third_party/WebKit/Source/modules/payments/PaymentsValidators.cpp

Index: third_party/WebKit/Source/modules/payments/PaymentsValidators.cpp
diff --git a/third_party/WebKit/Source/modules/payments/PaymentsValidators.cpp b/third_party/WebKit/Source/modules/payments/PaymentsValidators.cpp
index 6a1fbc0b89a90a6eb8ab097bed0f2dbc50787cda..5fe6dd2cd91e9b298c9c2da680fdb89e1cdb10fb 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentsValidators.cpp
+++ b/third_party/WebKit/Source/modules/payments/PaymentsValidators.cpp
@@ -40,7 +40,7 @@ bool PaymentsValidators::isValidCountryCodeFormat(const String& code, String* op
         return true;
 
     if (optionalErrorMessage)
-        *optionalErrorMessage = "'" + code + "' is not a valid ISO 3166 country code, should be 2 upper case letters [A-Z]";
+        *optionalErrorMessage = "'" + code + "' is not a valid CLDR country code, should be 2 upper case letters [A-Z]";
 
     return false;
 }
@@ -51,7 +51,7 @@ bool PaymentsValidators::isValidLanguageCodeFormat(const String& code, String* o
         return true;
 
     if (optionalErrorMessage)
-        *optionalErrorMessage = "'" + code + "' is not a valid ISO 639 language code, should be 2-3 lower case letters [a-z]";
+        *optionalErrorMessage = "'" + code + "' is not a valid BCP-47 language code, should be 2-3 lower case letters [a-z]";
 
     return false;
 }