Throw if PaymentRequest() built with 'error' message

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 120 matching lines @@
     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);
+
+  if (detail == PaymentTestDetailError)
+    result.setError(valueToUse);
 
   return result;
 }
 
 PaymentDetails buildPaymentDetailsErrorMsgForTest(const String& valueToUse) {
   return buildPaymentDetailsForTest(PaymentTestDetailError, PaymentTestDataNone,
                                     PaymentTestOverwriteValue, valueToUse);
 }
 
 HeapVector<PaymentMethodData> buildPaymentMethodDataForTest() {
@@ skipping 62 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