Simplify WebServiceWorker{Registration}Proxy interfaces.

Source/modules/serviceworkers/ServiceWorkerRegistration.cpp

 // 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 "ServiceWorkerRegistration.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
@@ skipping 108 matching lines @@
 
     m_provider->unregisterServiceWorker(scopeURL, new CallbackPromiseAdapter<BooleanValue, ServiceWorkerError>(resolver));
     return promise;
 }
 
 ServiceWorkerRegistration* ServiceWorkerRegistration::getOrCreate(ExecutionContext* executionContext, WebServiceWorkerRegistration* outerRegistration)
 {
     if (!outerRegistration)
         return 0;
 
-    WebServiceWorkerRegistrationProxy* proxy = outerRegistration->proxy();
-    if (proxy) {
-        ServiceWorkerRegistration* existingRegistration = *proxy;
-        if (existingRegistration) {
-            ASSERT(existingRegistration->executionContext() == executionContext);
-            return existingRegistration;
-        }
+    ServiceWorkerRegistration* existingRegistration = static_cast<ServiceWorkerRegistration*>(outerRegistration->proxy());
+    if (existingRegistration) {
+        ASSERT(existingRegistration->executionContext() == executionContext);
+        return existingRegistration;
     }
 
     ServiceWorkerRegistration* registration = new ServiceWorkerRegistration(executionContext, adoptPtr(outerRegistration));
     registration->suspendIfNeeded();
     return registration;
 }
 
 ServiceWorkerRegistration::ServiceWorkerRegistration(ExecutionContext* executionContext, PassOwnPtr<WebServiceWorkerRegistration> outerRegistration)
     : ActiveDOMObject(executionContext)
-    , WebServiceWorkerRegistrationProxy(this)
     , m_outerRegistration(outerRegistration)
     , m_provider(0)
     , m_stopped(false)
 {
     ASSERT(m_outerRegistration);
 
     if (!executionContext)
         return;
     if (ServiceWorkerContainerClient* client = ServiceWorkerContainerClient::from(executionContext))
         m_provider = client->provider();
@@ skipping 16 matching lines @@
 
 void ServiceWorkerRegistration::stop()
 {
     if (m_stopped)
         return;
     m_stopped = true;
     m_outerRegistration->proxyStopped();
 }
 
 } // namespace blink