ServiceWorker: Make "ready" fetches registration from browser process(2/3).

content/browser/service_worker/service_worker_registration.h

Index: content/browser/service_worker/service_worker_registration.h
diff --git a/content/browser/service_worker/service_worker_registration.h b/content/browser/service_worker/service_worker_registration.h
index 768b6519d02e4cc4a70d883f857f5269c1b8be82..26184839c417c45962630e80c2b0e8fde3454119 100644
--- a/content/browser/service_worker/service_worker_registration.h
+++ b/content/browser/service_worker/service_worker_registration.h
@@ -42,6 +42,8 @@ class CONTENT_EXPORT ServiceWorkerRegistration
         const ServiceWorkerRegistrationInfo& info) {}
     virtual void OnRegistrationFailed(
         ServiceWorkerRegistration* registration) {}
+    virtual void OnRegistrationFinishedUninstalling(
+        ServiceWorkerRegistration* registration) {}
     virtual void OnUpdateFound(
         ServiceWorkerRegistration* registration) {}
     virtual void OnSkippedWaiting(ServiceWorkerRegistration* registation) {}