[Web Payments] Add data attribution string to dialog

components/payments/core/test_payment_request_delegate.cc

Index: components/payments/core/test_payment_request_delegate.cc
diff --git a/components/payments/core/test_payment_request_delegate.cc b/components/payments/core/test_payment_request_delegate.cc
index 5309b1ae65581078b9c3669ee614b87ef6cee1b5..92765cb4d10774e14195adb25ad4ab6920e126bb 100644
--- a/components/payments/core/test_payment_request_delegate.cc
+++ b/components/payments/core/test_payment_request_delegate.cc
@@ -77,4 +77,12 @@ void TestPaymentRequestDelegate::CompleteFullCardRequest() {
       full_card_request_card_, base::ASCIIToUTF16("123"));
 }
 
+std::string TestPaymentRequestDelegate::GetAuthenticatedEmail() const {
+  return "";
+}
+
+PrefService* TestPaymentRequestDelegate::GetPrefService() {
+  return nullptr;
+}
+
 }  // namespace payments