PaymentApp: Add interfaces for implementing InvokePaymentApp().

content/browser/service_worker/embedded_worker_test_helper.cc

Index: content/browser/service_worker/embedded_worker_test_helper.cc
diff --git a/content/browser/service_worker/embedded_worker_test_helper.cc b/content/browser/service_worker/embedded_worker_test_helper.cc
index 0ef41277a3ae06c8dbf0389d9a7d7ff6a8d54ea2..b2f802133e3304c61d69a9c05e8eebff7d25e177 100644
--- a/content/browser/service_worker/embedded_worker_test_helper.cc
+++ b/content/browser/service_worker/embedded_worker_test_helper.cc
@@ -186,6 +186,12 @@ class EmbeddedWorkerTestHelper::MockServiceWorkerEventDispatcher
     NOTIMPLEMENTED();
   }
 
+  void DispatchPaymentRequestEvent(
+      payments::mojom::PaymentAppRequestDataPtr data,
+      const DispatchPaymentRequestEventCallback& callback) override {
+    NOTIMPLEMENTED();
+  }
+
   void DispatchExtendableMessageEvent(
       mojom::ExtendableMessageEventPtr event,
       const DispatchExtendableMessageEventCallback& callback) override {