Merge RenderWidget into single subclass, RenderPart

Source/core/html/HTMLObjectElement.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, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  *
  * 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
@@ skipping 57 matching lines @@
     element->ensureUserAgentShadowRoot();
     return element.release();
 }
 
 void HTMLObjectElement::trace(Visitor* visitor)
 {
     FormAssociatedElement::trace(visitor);
     HTMLPlugInElement::trace(visitor);
 }
 
-RenderWidget* HTMLObjectElement::existingRenderWidget() const
+RenderPart* HTMLObjectElement::existingRenderPart() const
 {
     return renderPart(); // This will return 0 if the renderer is not a RenderPart.
 }
 
 bool HTMLObjectElement::isPresentationAttribute(const QualifiedName& name) const
 {
     if (name == borderAttr)
         return true;
     return HTMLPlugInElement::isPresentationAttribute(name);
 }
@@ skipping 368 matching lines @@
 {
     return fastHasAttribute(usemapAttr);
 }
 
 bool HTMLObjectElement::useFallbackContent() const
 {
     return HTMLPlugInElement::useFallbackContent() || m_useFallbackContent;
 }
 
 }