[Retry] ServiceWorker: Implement ServiceWorkerRegistration.update() (1)

public/platform/WebServiceWorkerRegistration.h

Index: public/platform/WebServiceWorkerRegistration.h
diff --git a/public/platform/WebServiceWorkerRegistration.h b/public/platform/WebServiceWorkerRegistration.h
index f7d0d3e96cc14af54be35e6c9ef681ae73cee0ae..2cf1a27311ae3dacfc2f4dd2710c6e1b89b5bdb6 100644
--- a/public/platform/WebServiceWorkerRegistration.h
+++ b/public/platform/WebServiceWorkerRegistration.h
@@ -9,6 +9,7 @@
 
 namespace blink {
 
+class WebServiceWorkerProvider;
 class WebServiceWorkerRegistrationProxy;
 
 class WebServiceWorkerRegistration {
@@ -20,6 +21,7 @@ public:
     virtual void proxyStopped() { }
 
     virtual WebURL scope() const { return WebURL(); }
+    virtual void update(WebServiceWorkerProvider*) { }
 };
 
 } // namespace blink