Move HTMLContentElement & HTMLShadowElement out of shadow/

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 16 matching lines @@
 #include "HTMLNames.h"
 #include "bindings/v8/ScriptController.h"
 #include "bindings/v8/npruntime_impl.h"
 #include "core/dom/Document.h"
 #include "core/dom/Node.h"
 #include "core/dom/PostAttachCallbacks.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/events/Event.h"
 #include "core/frame/ContentSecurityPolicy.h"
 #include "core/frame/LocalFrame.h"
+#include "core/html/HTMLContentElement.h"
 #include "core/html/HTMLImageLoader.h"
 #include "core/html/PluginDocument.h"
-#include "core/html/shadow/HTMLContentElement.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/page/EventHandler.h"
 #include "core/page/Page.h"
 #include "core/frame/Settings.h"
 #include "core/plugins/PluginView.h"
 #include "core/rendering/RenderEmbeddedObject.h"
 #include "core/rendering/RenderImage.h"
 #include "core/rendering/RenderWidget.h"
 #include "platform/Logging.h"
 #include "platform/MIMETypeFromURL.h"
@@ skipping 480 matching lines @@
     if (root.isOldestAuthorShadowRoot())
         lazyReattachIfAttached();
 }
 
 bool HTMLPlugInElement::useFallbackContent() const
 {
     return hasAuthorShadowRoot();
 }
 
 }