Remove ~1750 superfluous includes from core

Source/core/html/HTMLEmbedElement.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, 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/html/HTMLEmbedElement.h"
 
 #include "CSSPropertyNames.h"
 #include "HTMLNames.h"
 #include "core/dom/Attribute.h"
-#include "core/html/HTMLDocument.h"
 #include "core/html/HTMLImageLoader.h"
 #include "core/html/HTMLObjectElement.h"
 #include "core/html/PluginDocument.h"
 #include "core/html/parser/HTMLParserIdioms.h"
-#include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/page/Frame.h"
-#include "core/page/Settings.h"
-#include "core/rendering/RenderEmbeddedObject.h"
-#include "core/rendering/RenderImage.h"
 #include "core/rendering/RenderWidget.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 inline HTMLEmbedElement::HTMLEmbedElement(const QualifiedName& tagName, Document* document, bool createdByParser)
     : HTMLPlugInImageElement(tagName, document, createdByParser, ShouldPreferPlugInsForImages)
 {
     ASSERT(hasTagName(embedTag));
@@ skipping 156 matching lines @@
 }
 
 void HTMLEmbedElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
 {
     HTMLPlugInImageElement::addSubresourceAttributeURLs(urls);
 
     addSubresourceURL(urls, document()->completeURL(getAttribute(srcAttr)));
 }
 
 }