Oilpan: move MessagePortArray to the heap.

Source/core/workers/WorkerMessagingProxy.cpp

Index: Source/core/workers/WorkerMessagingProxy.cpp
diff --git a/Source/core/workers/WorkerMessagingProxy.cpp b/Source/core/workers/WorkerMessagingProxy.cpp
index 28132bf21cd42449ebc90c3e83cb8c8e03b670ad..6abc7aa627d4072fad61ada8b5a6fe9488e9e65b 100644
--- a/Source/core/workers/WorkerMessagingProxy.cpp
+++ b/Source/core/workers/WorkerMessagingProxy.cpp
@@ -72,7 +72,7 @@ private:
     {
         ASSERT_WITH_SECURITY_IMPLICATION(scriptContext->isWorkerGlobalScope());
         DedicatedWorkerGlobalScope* context = static_cast<DedicatedWorkerGlobalScope*>(scriptContext);
-        OwnPtr<MessagePortArray> ports = MessagePort::entanglePorts(*scriptContext, m_channels.release());
+        OwnPtrWillBeRawPtr<MessagePortArray> ports = MessagePort::entanglePorts(*scriptContext, m_channels.release());
         context->dispatchEvent(MessageEvent::create(ports.release(), m_message));
         context->thread()->workerObjectProxy().confirmMessageFromWorkerObject(context->hasPendingActivity());
     }
@@ -125,7 +125,7 @@ void WorkerMessagingProxy::postMessageToWorkerObject(PassRefPtr<SerializedScript
     if (!m_workerObject || m_askedToTerminate)
         return;
 
-    OwnPtr<MessagePortArray> ports = MessagePort::entanglePorts(*m_executionContext.get(), channels);
+    OwnPtrWillBeRawPtr<MessagePortArray> ports = MessagePort::entanglePorts(*m_executionContext.get(), channels);
     m_workerObject->dispatchEvent(MessageEvent::create(ports.release(), message));
 }