[Background Sync] Use Mojo IPC to fire background sync events

content/browser/service_worker/service_worker_version.h

Index: content/browser/service_worker/service_worker_version.h
diff --git a/content/browser/service_worker/service_worker_version.h b/content/browser/service_worker/service_worker_version.h
index 0d97f9455cc7baa774ed07eb3ddd173f10e61c21..e0a3bd17ae9f4ca4447d385707c1da0458d3a142 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -20,6 +20,7 @@
 #include "base/observer_list.h"
 #include "base/timer/timer.h"
 #include "content/browser/service_worker/embedded_worker_instance.h"
+#include "content/browser/service_worker/service_worker_mojo_event_dispatcher.h"
 #include "content/browser/service_worker/service_worker_script_cache_map.h"
 #include "content/common/content_export.h"
 #include "content/common/service_worker/service_worker_status_code.h"
@@ -46,6 +47,7 @@ namespace content {
 
 class EmbeddedWorkerRegistry;
 class ServiceWorkerContextCore;
+class ServiceWorkerMojoEventDispatcher;
 class ServiceWorkerProviderHost;
 class ServiceWorkerRegistration;
 class ServiceWorkerURLRequestJob;
@@ -421,8 +423,7 @@ class CONTENT_EXPORT ServiceWorkerVersion
   void OnFetchEventFinished(int request_id,
                             ServiceWorkerFetchEventResult result,
                             const ServiceWorkerResponse& response);
-  void OnSyncEventFinished(int request_id,
-                           blink::WebServiceWorkerEventResult result);
+  void OnSyncEventFinished(int request_id, ServiceWorkerStatusCode status);
   void OnNotificationClickEventFinished(int request_id);
   void OnPushEventFinished(int request_id,
                            blink::WebServiceWorkerEventResult result);
@@ -573,6 +574,8 @@ class CONTENT_EXPORT ServiceWorkerVersion
   scoped_ptr<PingController> ping_controller_;
   scoped_ptr<Metrics> metrics_;
 
+  ServiceWorkerMojoEventDispatcher mojo_event_dispatcher_;
+
   base::WeakPtrFactory<ServiceWorkerVersion> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerVersion);