Oilpan: Remove raw pointer to InProcessWorkerBase from WorkerMessagingProxy

Source/core/workers/InProcessWorkerBase.cpp

 // Copyright 2015 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 "core/workers/InProcessWorkerBase.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/events/MessageEvent.h"
 #include "core/fetch/ResourceFetcher.h"
@@ skipping 10 matching lines @@
 
 InProcessWorkerBase::InProcessWorkerBase(ExecutionContext* context)
     : AbstractWorker(context)
     , m_contextProxy(nullptr)
 {
 }
 
 InProcessWorkerBase::~InProcessWorkerBase()
 {
     ASSERT(isMainThread());
+#if !ENABLE(OILPAN)
     if (!m_contextProxy)
         return;
     m_contextProxy->workerObjectDestroyed();
+#endif
 }
 
 void InProcessWorkerBase::postMessage(ExecutionContext* context, PassRefPtr<SerializedScriptValue> message, const MessagePortArray* ports, ExceptionState& exceptionState)
 {
     ASSERT(m_contextProxy);
     // Disentangle the port in preparation for sending it to the remote context.
     OwnPtr<MessagePortChannelArray> channels = MessagePort::disentanglePorts(context, ports, exceptionState);
     if (exceptionState.hadException())
         return;
     m_contextProxy->postMessageToWorkerGlobalScope(message, channels.release());
@@ skipping 61 matching lines @@
         m_contextProxy->startWorkerGlobalScope(m_scriptLoader->url(), executionContext()->userAgent(m_scriptLoader->url()), m_scriptLoader->script(), startMode);
         InspectorInstrumentation::scriptImported(executionContext(), m_scriptLoader->identifier(), m_scriptLoader->script());
     }
     m_contentSecurityPolicy = m_scriptLoader->releaseContentSecurityPolicy();
     m_scriptLoader = nullptr;
 }
 
 DEFINE_TRACE(InProcessWorkerBase)
 {
     visitor->trace(m_contentSecurityPolicy);
+    visitor->trace(m_contextProxy);
     AbstractWorker::trace(visitor);
 }
 
 } // namespace blink