Add totalAmount to PaymentResponse.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/payments/PaymentTestHelper.h"
 
 #include "modules/payments/CurrencyAmount.h"
 #include "platform/heap/HeapAllocator.h"
 
 namespace blink {
@@ skipping 80 matching lines @@
     return result;
 }
 
 HeapVector<PaymentMethodData> buildPaymentMethodDataForTest()
 {
     HeapVector<PaymentMethodData> methodData(1, PaymentMethodData());
     methodData[0].setSupportedMethods(Vector<String>(1, "foo"));
     return methodData;
 }
 
+mojom::blink::PaymentResponsePtr buildPaymentResponseForTest()
+{
+    mojom::blink::PaymentResponsePtr result = mojom::blink::PaymentResponse::New();
+    result->total_amount = mojom::blink::CurrencyAmount::New();
+    return result;
+}
+
 } // namespace blink