ServiceWorker: Introduce ExtendableMessageEvent to replace MessageEvent

content/child/service_worker/service_worker_dispatcher.h

Index: content/child/service_worker/service_worker_dispatcher.h
diff --git a/content/child/service_worker/service_worker_dispatcher.h b/content/child/service_worker/service_worker_dispatcher.h
index 45d75acbea3924092340f69e6d696081fe4f8d23..ead88e6a7ab42430dc966658a7cfc1d8b67e84fb 100644
--- a/content/child/service_worker/service_worker_dispatcher.h
+++ b/content/child/service_worker/service_worker_dispatcher.h
@@ -118,9 +118,9 @@ class CONTENT_EXPORT ServiceWorkerDispatcher
   // WebServiceWorkerImpl, in which case ownership is transferred to
   // the caller who must bounce it to a method that will associate it
   // with a WebCore::ServiceWorker.
-  WebServiceWorkerImpl* GetServiceWorker(
-      const ServiceWorkerObjectInfo& info,
-      bool adopt_handle);
+  WebServiceWorkerImpl* GetServiceWorker(const ServiceWorkerObjectInfo& info,
+                                         int provider_id,
+                                         bool adopt_handle);
 
   // Creates a WebServiceWorkerRegistrationImpl for the specified registration
   // and transfers its ownership to the caller. If |adopt_handle| is true, a
@@ -179,6 +179,7 @@ class CONTENT_EXPORT ServiceWorkerDispatcher
                                   int provider_id);
   void OnRegistered(int thread_id,
                     int request_id,
+                    int provider_id,
                     const ServiceWorkerRegistrationObjectInfo& info,
                     const ServiceWorkerVersionAttributes& attrs);
   void OnUnregistered(int thread_id,
@@ -186,16 +187,19 @@ class CONTENT_EXPORT ServiceWorkerDispatcher
                       bool is_success);
   void OnDidGetRegistration(int thread_id,
                             int request_id,
+                            int provider_id,
                             const ServiceWorkerRegistrationObjectInfo& info,
                             const ServiceWorkerVersionAttributes& attrs);
   void OnDidGetRegistrations(
       int thread_id,
       int request_id,
+      int provider_id,
       const std::vector<ServiceWorkerRegistrationObjectInfo>& infos,
       const std::vector<ServiceWorkerVersionAttributes>& attrs);
   void OnDidGetRegistrationForReady(
       int thread_id,
       int request_id,
+      int provider_id,
       const ServiceWorkerRegistrationObjectInfo& info,
       const ServiceWorkerVersionAttributes& attrs);
   void OnRegistrationError(int thread_id,
@@ -249,6 +253,7 @@ class CONTENT_EXPORT ServiceWorkerDispatcher
   // TODO(nhiroki): This assumption seems to impair readability. We could
   // explictly pass ServiceWorker(Registration)HandleReference instead.
   WebServiceWorkerRegistrationImpl* FindOrCreateRegistration(
+      int provider_id,
       const ServiceWorkerRegistrationObjectInfo& info,
       const ServiceWorkerVersionAttributes& attrs);