Oilpan: Move WorkerClients to the managed heap and trace its supplements.

Source/web/WebEmbeddedWorkerImpl.cpp

 /*
  * 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 229 matching lines @@
     }
 
     WorkerThreadStartMode startMode =
         (m_workerStartData.startMode == WebEmbeddedWorkerStartModePauseOnStart)
         ? PauseWorkerGlobalScopeOnStart : DontPauseWorkerGlobalScopeOnStart;
 
     // This is to be owned by ServiceWorker's WorkerGlobalScope, and is
     // guaranteed to be around while the WorkerGlobalScope is alive.
     WebServiceWorkerContextClient* contextClient = m_workerContextClient.get();
 
-    OwnPtr<WorkerClients> workerClients = WorkerClients::create();
+    OwnPtrWillBeRawPtr<WorkerClients> workerClients = WorkerClients::create();
     providePermissionClientToWorker(workerClients.get(), m_permissionClient.release());
     provideServiceWorkerGlobalScopeClientToWorker(workerClients.get(), ServiceWorkerGlobalScopeClientImpl::create(m_workerContextClient.release()));
 
     OwnPtrWillBeRawPtr<WorkerThreadStartupData> startupData =
         WorkerThreadStartupData::create(
             m_mainScriptLoader->url(),
             m_workerStartData.userAgent,
             m_mainScriptLoader->script(),
             startMode,
             // FIXME: fill appropriate CSP info and policy type.
             String(),
             ContentSecurityPolicyHeaderTypeEnforce,
             workerClients.release());
 
     m_mainScriptLoader.clear();
 
     m_workerGlobalScopeProxy = ServiceWorkerGlobalScopeProxy::create(*this, *toWebFrameImpl(m_mainFrame)->frame()->document(), *contextClient);
     m_loaderProxy = LoaderProxy::create(*this);
 
     m_workerThread = ServiceWorkerThread::create(*m_loaderProxy, *m_workerGlobalScopeProxy, startupData.release());
     m_workerThread->start();
 }
 
 } // namespace blink