Use the Navigator's frame in navigator.serviceWorker and associated container.

Source/modules/serviceworkers/ServiceWorkerContainerClient.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ServiceWorkerContainerClient_h
 #define ServiceWorkerContainerClient_h
 
-#include "core/page/Page.h"
+#include "core/dom/DocumentSupplementable.h"
 #include "core/workers/WorkerClients.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 class WebServiceWorkerProvider;
 }
 
 namespace WebCore {
 
 class ExecutionContext;
 
 // This mainly exists to provide access to WebServiceWorkerProvider.
-// Owned by Page (or WorkerClients).
+// Owned by Document (or WorkerClients).
 class ServiceWorkerContainerClient FINAL :
-    public Supplement<Page>,
+    public DocumentSupplement,
     public Supplement<WorkerClients> {
     WTF_MAKE_NONCOPYABLE(ServiceWorkerContainerClient);
 public:
     static PassOwnPtr<ServiceWorkerContainerClient> create(PassOwnPtr<blink::WebServiceWorkerProvider>);
     virtual ~ServiceWorkerContainerClient();
 
     blink::WebServiceWorkerProvider* provider() { return m_provider.get(); }
 
     static const char* supplementName();
     static ServiceWorkerContainerClient* from(ExecutionContext*);
 
 protected:
     explicit ServiceWorkerContainerClient(PassOwnPtr<blink::WebServiceWorkerProvider>);
 
     OwnPtr<blink::WebServiceWorkerProvider> m_provider;
 };
 
 void provideServiceWorkerContainerClientToWorker(WorkerClients*, PassOwnPtr<blink::WebServiceWorkerProvider>);
 
 } // namespace WebCore
 
 #endif // ServiceWorkerContainerClient_h