[PaymentReqeust] Add error message in PaymentDetails. (in blink side)

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 "bindings/core/v8/ScriptState.h"
 #include "core/dom/Document.h"
 #include "modules/payments/PaymentCurrencyAmount.h"
 #include "modules/payments/PaymentMethodData.h"
@@ skipping 96 matching lines @@
         shippingOption = buildShippingOptionForTest(data, modificationType, valueToUse);
     else
         shippingOption = buildShippingOptionForTest();
 
     PaymentDetailsModifier modifier;
     if (detail == PaymentTestDetailModifierTotal || detail == PaymentTestDetailModifierItem)
         modifier = buildPaymentDetailsModifierForTest(detail, data, modificationType, valueToUse);
     else
         modifier = buildPaymentDetailsModifierForTest();
 
+    String errorMessage = "";
+    if (detail == PaymentTestDetailError)
+        errorMessage = valueToUse;
+
     PaymentDetails result;
     result.setTotal(total);
     result.setDisplayItems(HeapVector<PaymentItem>(1, item));
     result.setShippingOptions(HeapVector<PaymentShippingOption>(1, shippingOption));
     result.setModifiers(HeapVector<PaymentDetailsModifier>(1, modifier));
+    result.setError(errorMessage);
 
     return result;
 }
 
+PaymentDetails buildPaymentDetailsErrorMsgForTest(const String& valueToUse)
+{
+    return buildPaymentDetailsForTest(PaymentTestDetailError, PaymentTestDataNone, PaymentTestOverwriteValue, valueToUse);
+}
+
 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();
@@ skipping 57 matching lines @@
     ON_CALL(*this, call(testing::_)).WillByDefault(
         testing::DoAll(SaveValueIn(m_value), testing::ReturnArg<0>()));
 }
 
 v8::Local<v8::Function> PaymentRequestMockFunctionScope::MockFunction::bind()
 {
     return bindToV8Function();
 }
 
 } // namespace blink