InlinedVisitor: Migrate html to use inlined tracing

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 67 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)
+DEFINE_TRACE(HTMLPlugInElement)
 {
     visitor->trace(m_imageLoader);
     visitor->trace(m_placeholder);
     visitor->trace(m_persistedPluginWidget);
     HTMLFrameOwnerElement::trace(visitor);
 }
 
 #if ENABLE(OILPAN)
 void HTMLPlugInElement::disconnectContentFrame()
 {
@@ skipping 573 matching lines @@
     return hasAuthorShadowRoot();
 }
 
 void HTMLPlugInElement::lazyReattachIfNeeded()
 {
     if (!useFallbackContent() && !usePlaceholderContent() && needsWidgetUpdate() && renderer() && !isImageType())
         lazyReattachIfAttached();
 }
 
 }