Add totalAmount to PaymentResponse.

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

Index: third_party/WebKit/Source/modules/payments/PaymentResponse.cpp
diff --git a/third_party/WebKit/Source/modules/payments/PaymentResponse.cpp b/third_party/WebKit/Source/modules/payments/PaymentResponse.cpp
index 66362d69ad24ad5e43b0193dec218e96b7c1646d..a12d16cda5a8080a89390b742959eff349cfe920 100644
--- a/third_party/WebKit/Source/modules/payments/PaymentResponse.cpp
+++ b/third_party/WebKit/Source/modules/payments/PaymentResponse.cpp
@@ -9,10 +9,26 @@
 #include "modules/payments/PaymentCompleter.h"
 #include "wtf/Assertions.h"
 
+namespace mojo {
+
+template <>
+struct TypeConverter<blink::CurrencyAmount, blink::mojom::blink::CurrencyAmount> {
+    static blink::CurrencyAmount Convert(const blink::mojom::blink::CurrencyAmount& input)
+    {
+        blink::CurrencyAmount output;
+        output.setCurrency(input.currency);
+        output.setValue(input.value);
+        return output;
+    }
+};
+
+} // namespace mojo
+
 namespace blink {
 
 PaymentResponse::PaymentResponse(mojom::blink::PaymentResponsePtr response, PaymentCompleter* paymentCompleter)
     : m_methodName(response->method_name)
+    , m_totalAmount(response->total_amount->To<CurrencyAmount>())
     , m_stringifiedDetails(response->stringified_details)
     , m_shippingAddress(response->shipping_address ? new PaymentAddress(std::move(response->shipping_address)) : nullptr)
     , m_paymentCompleter(paymentCompleter)