Oilpan: Prepare to move ImageLoader and its subclasses to Oilpan heap.

Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 64 matching lines @@
 {
     ASSERT(!m_pluginWrapper); // cleared in detach()
     ASSERT(!m_isDelayingLoadEvent);
 
     if (m_NPObject) {
         _NPN_ReleaseObject(m_NPObject);
         m_NPObject = 0;
     }
 }
 
+void HTMLPlugInElement::trace(Visitor* visitor)
+{
+    visitor->trace(m_imageLoader);
+    HTMLFrameOwnerElement::trace(visitor);
+}
+
 bool HTMLPlugInElement::canProcessDrag() const
 {
     return pluginWidget() && pluginWidget()->isPluginView() && toPluginView(pluginWidget())->canProcessDrag();
 }
 
 bool HTMLPlugInElement::willRespondToMouseClickEvents()
 {
     if (isDisabledFormControl())
         return false;
     RenderObject* r = renderer();
@@ skipping 18 matching lines @@
 
 void HTMLPlugInElement::attach(const AttachContext& context)
 {
     HTMLFrameOwnerElement::attach(context);
 
     if (!renderer() || useFallbackContent())
         return;
 
     if (isImageType()) {
         if (!m_imageLoader)
-            m_imageLoader = adoptPtr(new HTMLImageLoader(this));
+            m_imageLoader = HTMLImageLoader::create(this);
         m_imageLoader->updateFromElement();
     } else if (needsWidgetUpdate()
         && renderEmbeddedObject()
         && !renderEmbeddedObject()->showsUnavailablePluginIndicator()
         && !wouldLoadAsNetscapePlugin(m_url, m_serviceType)
         && !m_isDelayingLoadEvent) {
         m_isDelayingLoadEvent = true;
         document().incrementLoadEventDelayCount();
         document().loadPluginsSoon();
     }
@@ skipping 425 matching lines @@
 {
     return false;
 }
 
 bool HTMLPlugInElement::useFallbackContent() const
 {
     return hasAuthorShadowRoot();
 }
 
 }