Update installed ServiceWorkers.

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 5c24b2af1db97bf899cde8e20a95a66f340ab168..113bdb0022095b6414a14d9626523f2eb23deee0 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -63,27 +63,33 @@ class CONTENT_EXPORT ServiceWorkerVersion
     INSTALLING,  // Install event is dispatched and being handled.
     INSTALLED,   // Install event is finished and is ready to be activated.
     ACTIVATING,  // Activate event is dispatched and being handled.
-    ACTIVATED,      // Activation is finished and can run as activated.
+    ACTIVATED,   // Activation is finished and can run as activated.
     REDUNDANT,   // The version is no longer running as activated, due to
                  // unregistration or replace.
   };
 
   class Listener {
    public:
-    virtual void OnWorkerStarted(ServiceWorkerVersion* version) {};
-    virtual void OnWorkerStopped(ServiceWorkerVersion* version) {};
-    virtual void OnVersionStateChanged(ServiceWorkerVersion* version) {};
+    virtual void OnWorkerStarted(ServiceWorkerVersion* version) {}
+    virtual void OnWorkerStopped(ServiceWorkerVersion* version) {}
+    virtual void OnVersionStateChanged(ServiceWorkerVersion* version) {}
     virtual void OnErrorReported(ServiceWorkerVersion* version,
                                  const base::string16& error_message,
                                  int line_number,
                                  int column_number,
-                                 const GURL& source_url) {};
+                                 const GURL& source_url) {}
     virtual void OnReportConsoleMessage(ServiceWorkerVersion* version,
                                         int source_identifier,
                                         int message_level,
                                         const base::string16& message,
                                         int line_number,
-                                        const GURL& source_url) {};
+                                        const GURL& source_url) {}
+
+    // Fires when a version transitions from having a controllee to not.
+    virtual void OnNoControllees(ServiceWorkerVersion* version) {}
+
+   protected:
+    virtual ~Listener() {}
   };
 
   ServiceWorkerVersion(