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

Source/core/html/HTMLPlugInElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  *
  * 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 26 matching lines @@
 class Widget;
 
 enum PreferPlugInsForImagesOption {
     ShouldPreferPlugInsForImages,
     ShouldNotPreferPlugInsForImages
 };
 
 class HTMLPlugInElement : public HTMLFrameOwnerElement {
 public:
     virtual ~HTMLPlugInElement();
+    virtual void trace(Visitor*) OVERRIDE;
 
     void resetInstance();
     SharedPersistent<v8::Object>* pluginWrapper();
     Widget* pluginWidget() const;
     NPObject* getNPObject();
     bool canProcessDrag() const;
     const String& url() const { return m_url; }
 
     // Public for FrameView::addWidgetToUpdate()
     bool needsWidgetUpdate() const { return m_needsWidgetUpdate; }
@@ skipping 24 matching lines @@
     RenderEmbeddedObject* renderEmbeddedObject() const;
     bool allowedToLoadFrameURL(const String& url);
     bool requestObject(const String& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues);
     bool shouldUsePlugin(const KURL&, const String& mimeType, bool hasFallback, bool& useFallback);
 
     void dispatchErrorEvent();
 
     String m_serviceType;
     String m_url;
     KURL m_loadedUrl;
-    OwnPtr<HTMLImageLoader> m_imageLoader;
+    OwnPtrWillBeMember<HTMLImageLoader> m_imageLoader;
     bool m_isDelayingLoadEvent;
 
 private:
     // EventTarget functions:
     virtual void removeAllEventListeners() OVERRIDE FINAL;
 
     // Node functions:
     virtual bool canContainRangeEndPoint() const OVERRIDE { return false; }
     virtual bool willRespondToMouseClickEvents() OVERRIDE FINAL;
     virtual void defaultEventHandler(Event*) OVERRIDE FINAL;
@@ skipping 53 matching lines @@
 inline bool isHTMLPlugInElement(const HTMLElement& element)
 {
     return element.isPluginElement();
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLPlugInElement);
 
 } // namespace WebCore
 
 #endif // HTMLPlugInElement_h