Add currencySystem field to PaymentCurrencyAmount

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

Index: third_party/WebKit/Source/modules/payments/PaymentsValidators.h
diff --git a/third_party/WebKit/Source/modules/payments/PaymentsValidators.h b/third_party/WebKit/Source/modules/payments/PaymentsValidators.h
index d7285141add312dc7f01d84c5bef63d7f25b5d68..70bca7ffecd1a23a8e7800b370bf66ca9e5a15ed 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentsValidators.h
+++ b/third_party/WebKit/Source/modules/payments/PaymentsValidators.h
@@ -16,9 +16,12 @@ class MODULES_EXPORT PaymentsValidators final {
   STATIC_ONLY(PaymentsValidators);
 
  public:
-  // The most common identifiers are three-letter alphabetic codes as defined by [ISO4217] (for example, "USD" for US Dollars)
-  // however any string of at most 2048 characters is considered valid. Returns false if currency |code| is too long (greater than 2048).
+  // The most common identifiers are three-letter alphabetic codes as defined by [ISO4217] (for example, "USD" for US Dollars).
+  // |system| is a URL that indicates the currency system that the currency identifier belongs to. By default,
+  // the value is urn:iso:std:iso:4217 indicating that currency is defined by [[ISO4217]], however any string of at most 2048
+  // characters is considered valid in other currencySystem. Returns false if currency |code| is too long (greater than 2048).
   static bool isValidCurrencyCodeFormat(const String& code,
+                                        const String& system,
                                         String* optionalErrorMessage);
 
   // Returns true if |amount| is a valid currency code as defined in ISO 20022 CurrencyAnd30Amount.