Populate .current when navigator.serviceWorker is accessed

content/child/service_worker/web_service_worker_provider_impl.h

 // Copyright 2013 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 CONTENT_CHILD_SERVICE_WORKER_WEB_SERVICE_WORKER_PROVIDER_IMPL_H_
 #define CONTENT_CHILD_SERVICE_WORKER_WEB_SERVICE_WORKER_PROVIDER_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/WebKit/public/platform/WebServiceWorkerProvider.h"
 
 namespace blink {
 class WebURL;
 class WebServiceWorkerProviderClient;
 }
 
 namespace content {
 
 class ServiceWorkerDispatcher;
+class ServiceWorkerProviderContext;
 class ThreadSafeSender;
 
+// This class corresponds to one ServiceWorkerContainer interface in
+// JS context (i.e. navigator.serviceWorker).
 class WebServiceWorkerProviderImpl
     : NON_EXPORTED_BASE(public blink::WebServiceWorkerProvider) {
  public:
   WebServiceWorkerProviderImpl(ThreadSafeSender* thread_safe_sender,
-                               int provider_id);
+                               ServiceWorkerProviderContext* context);
   virtual ~WebServiceWorkerProviderImpl();
 
   virtual void setClient(blink::WebServiceWorkerProviderClient* client);
 
   virtual void registerServiceWorker(const blink::WebURL& pattern,
                                      const blink::WebURL& script_url,
                                      WebServiceWorkerCallbacks*);
 
   virtual void unregisterServiceWorker(const blink::WebURL& pattern,
                                        WebServiceWorkerCallbacks*);
 
+  ServiceWorkerProviderContext* context() { return context_.get(); }
+
  private:
   void RemoveScriptClient();
   ServiceWorkerDispatcher* GetDispatcher();
 
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
+  scoped_refptr<ServiceWorkerProviderContext> context_;
   const int provider_id_;
 
   DISALLOW_COPY_AND_ASSIGN(WebServiceWorkerProviderImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_SERVICE_WORKER_WEB_SERVICE_WORKER_PROVIDER_IMPL_H_