Remove more #includes from Frame.h

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 11 matching lines @@
 
 #include "config.h"
 #include "HTMLPlugInElement.h"
 
 #include "Attribute.h"
 #include "Chrome.h"
 #include "ChromeClient.h"
 #include "CSSPropertyNames.h"
 #include "Document.h"
 #include "Event.h"
+#include "EventHandler.h"
 #include "Frame.h"
 #include "FrameLoader.h"
 #include "FrameTree.h"
 #include "HTMLNames.h"
 #include "Page.h"
 #include "PluginViewBase.h"
 #include "RenderEmbeddedObject.h"
 #include "RenderWidget.h"
 #include "ScriptController.h"
 #include "Settings.h"
@@ skipping 196 matching lines @@
 
 NPObject* HTMLPlugInElement::getNPObject()
 {
     ASSERT(document()->frame());
     if (!m_NPObject)
         m_NPObject = document()->frame()->script()->createScriptObjectForPluginElement(this);
     return m_NPObject;
 }
 
 }