Simplify Supplementables post Oilpan.

third_party/WebKit/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 "modules/serviceworkers/ServiceWorkerRegistration.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/dom/DOMException.h"
@@ skipping 106 matching lines @@
 ServiceWorkerRegistration::~ServiceWorkerRegistration()
 {
 }
 
 DEFINE_TRACE(ServiceWorkerRegistration)
 {
     visitor->trace(m_installing);
     visitor->trace(m_waiting);
     visitor->trace(m_active);
     RefCountedGarbageCollectedEventTargetWithInlineData<ServiceWorkerRegistration>::trace(visitor);
-    HeapSupplementable<ServiceWorkerRegistration>::trace(visitor);
     ActiveDOMObject::trace(visitor);
+    Supplementable<ServiceWorkerRegistration>::trace(visitor);
 }
 
 bool ServiceWorkerRegistration::hasPendingActivity() const
 {
     return !m_stopped;
 }
 
 void ServiceWorkerRegistration::stop()
 {
     if (m_stopped)
         return;
     m_stopped = true;
     m_handle->registration()->proxyStopped();
 }
 
 } // namespace blink