Remove unused includes from core/{editing,fileapi,history,html}

Source/core/html/HTMLPlugInImageElement.h

 /*
  * Copyright (C) 2008, 2009, 2011, 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.
  *
  * 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.
  *
  */
 
 #ifndef HTMLPlugInImageElement_h
 #define HTMLPlugInImageElement_h
 
 #include "core/html/HTMLPlugInElement.h"
 
 #include "core/platform/MIMETypeFromURL.h"
 #include "core/rendering/style/RenderStyle.h"
-#include <wtf/OwnPtr.h>
-#include <wtf/RefPtr.h>
+#include "wtf/OwnPtr.h"
 
 namespace WebCore {
 
 class HTMLImageLoader;
 class FrameLoader;
 class Image;
 class MouseEvent;
 class Widget;
 
 enum PluginCreationOption {
@@ skipping 91 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(plugInElement->isPlugInImageElement());
     return static_cast<const HTMLPlugInImageElement*>(plugInElement);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toHTMLPlugInImageElement(const HTMLPlugInImageElement*);
 
 } // namespace WebCore
 
 #endif // HTMLPlugInImageElement_h