[Web Payments] Common Payments validation

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

Index: third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
diff --git a/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp b/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
index 54bac4920032ba1be47d41d67e947a92412d5df8..1e2b187aa5f8cddd33297d4eb9419606f5c245a1 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
+++ b/third_party/WebKit/Source/modules/payments/PaymentRequest.cpp
@@ -59,6 +59,8 @@ struct TypeConverter<PaymentCurrencyAmountPtr, blink::PaymentCurrencyAmount> {
     PaymentCurrencyAmountPtr output = PaymentCurrencyAmount::New();
     output->currency = input.currency();
     output->value = input.value();
+    if (input.hasCurrencySystem())
+      output->currencySystem = input.currencySystem();
     return output;
   }
 };