ServiceWorker: Add support for .skipWaiting and controllerchange event(2/3)

content/browser/service_worker/service_worker_provider_host.h

Index: content/browser/service_worker/service_worker_provider_host.h
diff --git a/content/browser/service_worker/service_worker_provider_host.h b/content/browser/service_worker/service_worker_provider_host.h
index 04fb21d0a2ba249c87600c0aa371ed9994f89ff2..f56391cf5a8f6f52e084ccdf98606c6798099e3e 100644
--- a/content/browser/service_worker/service_worker_provider_host.h
+++ b/content/browser/service_worker/service_worker_provider_host.h
@@ -141,6 +141,10 @@ class CONTENT_EXPORT ServiceWorkerProviderHost
 
   // ServiceWorkerRegistration::Listener overrides.
   void OnRegistrationFailed(ServiceWorkerRegistration* registration) override;
+  void OnVersionAttributesChanged(
+      ServiceWorkerRegistration* registration,
+      ChangedVersionAttributesMask changed_mask,
+      const ServiceWorkerRegistrationInfo& info) override;
 
   // Sets the controller version field to |version| or if |version| is NULL,
   // clears the field.