Simplify WebServiceWorker{Registration}Proxy interfaces.

Source/platform/exported/WebServiceWorkerRegistrationProxy.cpp

Index: Source/platform/exported/WebServiceWorkerRegistrationProxy.cpp
diff --git a/Source/platform/exported/WebServiceWorkerRegistrationProxy.cpp b/Source/platform/exported/WebServiceWorkerRegistrationProxy.cpp
deleted file mode 100644
index 01643153457a756b200ac44a518903a1f4c0f1e2..0000000000000000000000000000000000000000
--- a/Source/platform/exported/WebServiceWorkerRegistrationProxy.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-// 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/WebServiceWorkerRegistrationProxy.h"
-
-namespace blink {
-
-WebServiceWorkerRegistrationProxy::WebServiceWorkerRegistrationProxy(ServiceWorkerRegistration* registration)
-    : m_private(registration)
-{
-}
-
-WebServiceWorkerRegistrationProxy::operator ServiceWorkerRegistration*() const
-{
-    return m_private;
-}
-
-} // namespace blink