PaymentApp: Implement invokePaymentApp() in renderer side.

content/renderer/service_worker/service_worker_context_client.h

 // Copyright 2014 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.
 
 #ifndef CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_
 #define CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 152 matching lines @@
   void didHandleNotificationCloseEvent(
       int request_id,
       blink::WebServiceWorkerEventResult result,
       double dispatch_event_time) override;
   void didHandlePushEvent(int request_id,
                           blink::WebServiceWorkerEventResult result,
                           double dispatch_event_time) override;
   void didHandleSyncEvent(int request_id,
                           blink::WebServiceWorkerEventResult result,
                           double dispatch_event_time) override;
+  void didHandlePaymentRequestEvent(int request_id,
+                                    blink::WebServiceWorkerEventResult result,
+                                    double dispatch_event_time) override;
 
   // Called on the main thread.
   blink::WebServiceWorkerNetworkProvider* createServiceWorkerNetworkProvider(
       blink::WebDataSource* data_source) override;
   blink::WebServiceWorkerProvider* createServiceWorkerProvider() override;
 
   void postMessageToClient(
       const blink::WebString& uuid,
       const blink::WebString& message,
       blink::WebMessagePortChannelArray* channels) override;
@@ skipping 113 matching lines @@
   // Initialized on the worker thread in workerContextStarted and
   // destructed on the worker thread in willDestroyWorkerContext.
   std::unique_ptr<WorkerContextData> context_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_