Update the PushEvent to have a nullable PushMessageData

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 35 matching lines @@
 }
 
 namespace IPC {
 class Message;
 }
 
 namespace content {
 
 struct NavigatorConnectClient;
 struct PlatformNotificationData;
+struct PushEventPayload;
 struct ServiceWorkerClientInfo;
 class ServiceWorkerProviderContext;
 class ServiceWorkerContextClient;
 class ThreadSafeSender;
 class WebServiceWorkerRegistrationImpl;
 
 // This class provides access to/from an ServiceWorker's WorkerGlobalScope.
 // Unless otherwise noted, all methods are called on the worker thread.
 class ServiceWorkerContextClient
     : public blink::WebServiceWorkerContextClient {
@@ skipping 119 matching lines @@
       const ServiceWorkerVersionAttributes& attrs);
 
   void OnActivateEvent(int request_id);
   void OnInstallEvent(int request_id);
   void OnFetchEvent(int request_id, const ServiceWorkerFetchRequest& request);
   void OnNotificationClickEvent(
       int request_id,
       int64_t persistent_notification_id,
       const PlatformNotificationData& notification_data,
       int action_index);
-  void OnPushEvent(int request_id, const std::string& data);
+  void OnPushEvent(int request_id, const PushEventPayload& payload);
   void OnGeofencingEvent(int request_id,
                          blink::WebGeofencingEventType event_type,
                          const std::string& region_id,
                          const blink::WebCircularGeofencingRegion& region);
   void OnPostMessage(
       const base::string16& message,
       const std::vector<TransferredMessagePort>& sent_message_ports,
       const std::vector<int>& new_routing_ids);
   void OnCrossOriginMessageToWorker(
       const NavigatorConnectClient& client,
@@ skipping 36 matching lines @@
   // Initialized on the worker thread in workerContextStarted and
   // destructed on the worker thread in willDestroyWorkerContext.
   scoped_ptr<WorkerContextData> context_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_