Oilpan: move core/workers to oilpan's heap.

Source/core/dom/MessageChannel.cpp

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 
 #include "config.h"
 #include "core/dom/MessageChannel.h"
 
 #include "core/dom/MessagePort.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebMessagePortChannel.h"
 
 namespace WebCore {
 
+DEFINE_GC_INFO(MessageChannel);
+
 static void createChannel(MessagePort* port1, MessagePort* port2)
 {
     // Create proxies for each endpoint.
     OwnPtr<blink::WebMessagePortChannel> channel1 = adoptPtr(blink::Platform::current()->createMessagePortChannel());
     OwnPtr<blink::WebMessagePortChannel> channel2 = adoptPtr(blink::Platform::current()->createMessagePortChannel());
 
     // Entangle the two endpoints.
     channel1->entangle(channel2.get());
     channel2->entangle(channel1.get());
 
     // Now entangle the proxies with the appropriate local ports.
     port1->entangle(channel2.release());
     port2->entangle(channel1.release());
 }
 
 MessageChannel::MessageChannel(ExecutionContext* context)
     : m_port1(MessagePort::create(*context))
     , m_port2(MessagePort::create(*context))
 {
     ScriptWrappable::init(this);
     createChannel(m_port1.get(), m_port2.get());
 }
 
 MessageChannel::~MessageChannel()
 {
 }
 
+void MessageChannel::trace(Visitor* visitor)
+{
+    visitor->trace(m_port1);
+    visitor->trace(m_port2);
+}
+
 } // namespace WebCore