WebServiceWorkerProxy instances can be unwrapped to ServiceWorkers.

Source/platform/exported/WebServiceWorkerProxy.cpp

Index: Source/platform/exported/WebServiceWorkerProxy.cpp
diff --git a/Source/platform/exported/WebServiceWorkerProxy.cpp b/Source/platform/exported/WebServiceWorkerProxy.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2e57d0e9465b1985a47811d6f89a8ff244fcc1b7
--- /dev/null
+++ b/Source/platform/exported/WebServiceWorkerProxy.cpp
@@ -0,0 +1,22 @@
+// 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.
+
+#include "config.h"
+#include "public/platform/WebServiceWorkerProxy.h"
+
+namespace WebCore { class ServiceWorker; }
+
+namespace blink {
+
+WebServiceWorkerProxy::WebServiceWorkerProxy(WebCore::ServiceWorker* serviceWorker)
+    : m_private(serviceWorker)
+{
+}
+
+WebCore::ServiceWorker* WebServiceWorkerProxy::unwrap() const
+{
+    return m_private;
+}
+
+} // namespace blink