The blink half of the new ServiceWorker 'sync' event.

public/web/WebServiceWorkerContextClient.h

Index: public/web/WebServiceWorkerContextClient.h
diff --git a/public/web/WebServiceWorkerContextClient.h b/public/web/WebServiceWorkerContextClient.h
index 42edd0c06e132e5ff795f98838281cd9f2e4fd35..9a0fd7538029cec773f7b2c8ef74ea5aec212616 100644
--- a/public/web/WebServiceWorkerContextClient.h
+++ b/public/web/WebServiceWorkerContextClient.h
@@ -95,6 +95,11 @@ public:
 
     // Ownership of the returned object is transferred to the caller.
     virtual WebServiceWorkerNetworkProvider* createServiceWorkerNetworkProvider(blink::WebDataSource*) { return 0; }
+
+    // ServiceWorker specific method. Called after SyncEvent (dispatched via
+    // WebServiceWorkerContextProxy) is handled by the ServiceWorker's script
+    // context.
+    virtual void didHandleSyncEvent(int syncEventID) { }
 };
 
 } // namespace blink