ServiceWorker: Implement navigator.serviceWorker.getRegistration [1/3]

public/platform/WebServiceWorkerProvider.h

Index: public/platform/WebServiceWorkerProvider.h
diff --git a/public/platform/WebServiceWorkerProvider.h b/public/platform/WebServiceWorkerProvider.h
index 9e138e05943234e50d469e66a134bc18e2e90cef..ada51f9ee25484237d915d7ed947a77232a75266 100644
--- a/public/platform/WebServiceWorkerProvider.h
+++ b/public/platform/WebServiceWorkerProvider.h
@@ -55,12 +55,15 @@ public:
     // passed to the WebServiceWorkerRegistrationCallbacks implementation.
     typedef WebCallbacks<WebServiceWorkerRegistration, WebServiceWorkerError> WebServiceWorkerRegistrationCallbacks;
     typedef WebCallbacks<bool, WebServiceWorkerError> WebServiceWorkerUnregistrationCallbacks;
+    typedef WebCallbacks<WebServiceWorkerRegistration, WebServiceWorkerError> WebServiceWorkerGetRegistrationCallbacks;
 
     virtual void registerServiceWorker(const WebURL& pattern, const WebURL& scriptUrl, WebServiceWorkerRegistrationCallbacks*) { }
 
     // Unregisters the ServiceWorker for a given scope.
     virtual void unregisterServiceWorker(const WebURL& pattern, WebServiceWorkerUnregistrationCallbacks*) { }
 
+    virtual void getRegistration(const WebURL& documentURL, WebServiceWorkerGetRegistrationCallbacks*) { }
+
     virtual ~WebServiceWorkerProvider() { }
 };