PaymentApp: Blink side of payment request event dispatching in service worker.

third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h

Index: third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
diff --git a/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h b/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
index cdf5b2b5b74ba580b2f5e83b18f9ba7b9bcb1df5..d37d2f78453f3819aea0c5e2859df753914d1550 100644
--- a/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
+++ b/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
@@ -189,6 +189,13 @@ class WebServiceWorkerContextClient {
                                   WebServiceWorkerEventResult result,
                                   double eventDispatchTime) {}
 
+  // ServiceWorker specific method. Called after PaymentRequestEvent (dispatched
+  // via WebServiceWorkerContextProxy) is handled by the ServiceWorker's script
+  // context.
+  virtual void didHandlePaymentRequestEvent(int paymentRequestEventID,
+                                            WebServiceWorkerEventResult result,
+                                            double eventDispatchTime) {}
+
   // Ownership of the returned object is transferred to the caller.
   // This is called on the main thread.
   virtual WebServiceWorkerNetworkProvider* createServiceWorkerNetworkProvider(