ServiceWorker: Introduce ExtendableMessageEvent to replace MessageEvent

content/renderer/service_worker/service_worker_context_client.h

Index: content/renderer/service_worker/service_worker_context_client.h
diff --git a/content/renderer/service_worker/service_worker_context_client.h b/content/renderer/service_worker/service_worker_context_client.h
index 395276da45d28ebf998683bcc82b6a2d92901faf..79c70415bd1a032dc3f7c12046a17784e9fd4ed5 100644
--- a/content/renderer/service_worker/service_worker_context_client.h
+++ b/content/renderer/service_worker/service_worker_context_client.h
@@ -120,6 +120,8 @@ class ServiceWorkerContextClient
                                   blink::WebServiceWorkerEventResult result);
   virtual void didHandleCrossOriginConnectEvent(int request_id,
                                                 bool accept_connection);
+  virtual void didHandleMessageEvent(int request_id,
+                                     blink::WebServiceWorkerEventResult result);
 
   // Called on the main thread.
   virtual blink::WebServiceWorkerNetworkProvider*
@@ -168,7 +170,15 @@ class ServiceWorkerContextClient
                          const blink::WebCircularGeofencingRegion& region);
   void OnCrossOriginConnectEvent(int request_id,
                                  const NavigatorConnectClient& client);
-  void OnPostMessage(
+  void OnClientMessageEvent(
+      int client_id,
+      const ServiceWorkerClientInfo& client,
+      const base::string16& message,
+      const std::vector<TransferredMessagePort>& sent_message_ports,
+      const std::vector<int>& new_routing_ids);
+  void OnWorkerMessageEvent(
+      int client_id,
+      const ServiceWorkerObjectInfo& worker,
       const base::string16& message,
       const std::vector<TransferredMessagePort>& sent_message_ports,
       const std::vector<int>& new_routing_ids);