Add blink-side binding code for navigator.serviceWorker.current

Source/modules/serviceworkers/ServiceWorkerContainer.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ServiceWorkerContainer_h
 #define ServiceWorkerContainer_h
 
 #include "bindings/v8/ScriptPromise.h"
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/frame/DOMWindowLifecycleObserver.h"
+#include "modules/serviceworkers/ServiceWorker.h"
 #include "public/platform/WebServiceWorkerProviderClient.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 class WebServiceWorkerProvider;
 class WebServiceWorker;
 }
 
@@ skipping 11 matching lines @@
     public blink::WebServiceWorkerProviderClient {
 public:
     static PassRefPtr<ServiceWorkerContainer> create(ExecutionContext*);
     ~ServiceWorkerContainer();
 
     void detachClient();
 
     ScriptPromise registerServiceWorker(ExecutionContext*, const String& pattern, const Dictionary&);
     ScriptPromise unregisterServiceWorker(ExecutionContext*, const String& scope = String());
 
+    PassRefPtr<ServiceWorker> current() { return m_current; }
+
     // WebServiceWorkerProviderClient overrides.
     virtual void setCurrentServiceWorker(blink::WebServiceWorker*) OVERRIDE;
     virtual void dispatchMessageEvent(const blink::WebString& message, const blink::WebMessagePortChannelArray&) OVERRIDE;
 
 private:
     explicit ServiceWorkerContainer(ExecutionContext*);
 
     blink::WebServiceWorkerProvider* m_provider;
     RefPtr<ServiceWorker> m_current;
 };
 
 } // namespace WebCore
 
 #endif // ServiceWorkerContainer_h