[Web Payments] Common Payments validation

components/payments/payment_request.mojom

Index: components/payments/payment_request.mojom
diff --git a/components/payments/payment_request.mojom b/components/payments/payment_request.mojom
index dc9ab3374af80aed7ef648580855df5aa42f40e3..5ccb598cc4b35d75bc564168eaa66127e6b4b268 100644
--- a/components/payments/payment_request.mojom
+++ b/components/payments/payment_request.mojom
@@ -43,6 +43,8 @@ struct PaymentCurrencyAmount {
   // ISO 20022 CurrencyAnd30Amount. Up to 30 total digits. Up to 10 fraction
   // digits. Separated by a dot.
   string value;
+

[please use gerrit instead, 2016/10/31 14:31:15]

Please add a comment from
https://w3c.github.io/browser-payment-api/#paymentcurrencyamount

// currencySystem 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]
// (for example, USD for US Dollars).

[Kevin Bailey, 2016/10/31 20:32:00]

Done.

+  string? system;
 };
 
 struct PaymentResponse {