Make RenderObject::style() return a const object

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 245 matching lines @@
     }
 
     if (m_NPObject) {
         _NPN_ReleaseObject(m_NPObject);
         m_NPObject = 0;
     }
 
     HTMLFrameOwnerElement::detach(context);
 }
 
-RenderObject* HTMLPlugInElement::createRenderer(RenderStyle* style)
+RenderObject* HTMLPlugInElement::createRenderer(const RenderStyle* style)
 {
     // Fallback content breaks the DOM->Renderer class relationship of this
     // class and all superclasses because createObject won't necessarily return
     // a RenderEmbeddedObject or RenderPart.
     if (useFallbackContent())
         return RenderObject::createObject(this, style);
 
     if (isImageType()) {
         RenderImage* image = new RenderImage(this);
         image->setImageResource(RenderImageResource::create());
@@ skipping 387 matching lines @@
     return hasAuthorShadowRoot();
 }
 
 void HTMLPlugInElement::lazyReattachIfNeeded()
 {
     if (!useFallbackContent() && !usePlaceholderContent() && needsWidgetUpdate() && renderer() && !isImageType())
         lazyReattachIfAttached();
 }
 
 }