[3/5 chromium] Shows the clients which are controlled by ServiceWorker in DevTools.

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 d77ed99202c02013e012641c7be48c86996778c0..0d97f9455cc7baa774ed07eb3ddd173f10e61c21 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -110,6 +110,11 @@ class CONTENT_EXPORT ServiceWorkerVersion
                                         const base::string16& message,
                                         int line_number,
                                         const GURL& source_url) {}
+    virtual void OnControlleeAdded(ServiceWorkerVersion* version,
+                                   ServiceWorkerProviderHost* provider_host) {}
+    virtual void OnControlleeRemoved(ServiceWorkerVersion* version,
+                                     ServiceWorkerProviderHost* provider_host) {
+    }
     // Fires when a version transitions from having a controllee to not.
     virtual void OnNoControllees(ServiceWorkerVersion* version) {}
     virtual void OnCachedMetadataUpdated(ServiceWorkerVersion* version) {}