Do not use SubtreeStyleChange for reattachment of plugin renderers.

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 73 matching lines @@
 
     bool isImageType();
     bool shouldPreferPlugInsForImages() const { return m_shouldPreferPlugInsForImages; }
     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();
 
+    void triggerReattachThroughStyleRecalcHack();
+
     String m_serviceType;
     String m_url;
     KURL m_loadedUrl;
     OwnPtrWillBeMember<HTMLImageLoader> m_imageLoader;
     bool m_isDelayingLoadEvent;
 
 private:
     // EventTarget functions:
     virtual void removeAllEventListeners() OVERRIDE FINAL;
 
@@ skipping 45 matching lines @@
 inline bool isHTMLPlugInElement(const HTMLElement& element)
 {
     return element.isPluginElement();
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLPlugInElement);
 
 } // namespace blink
 
 #endif // HTMLPlugInElement_h