Remove ~1750 superfluous includes from core

Source/core/html/HTMLDocument.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 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 43 matching lines @@
 #include "core/html/HTMLDocument.h"
 
 #include "HTMLNames.h"
 #include "bindings/v8/ScriptController.h"
 #include "core/html/HTMLBodyElement.h"
 #include "core/page/FocusController.h"
 #include "core/page/Frame.h"
 #include "core/page/FrameTree.h"
 #include "core/page/FrameView.h"
 #include "core/page/Page.h"
-#include "core/platform/KURL.h"
 
 namespace WebCore {
 
 using namespace HTMLNames;
 
 HTMLDocument::HTMLDocument(Frame* frame, const KURL& url, DocumentClassFlags extendedDocumentClasses)
     : Document(frame, url, HTMLDocumentClass | extendedDocumentClasses)
 {
     ScriptWrappable::init(this);
     clearXMLVersion();
@@ skipping 290 matching lines @@
 }
 
 void HTMLDocument::clear()
 {
     // FIXME: This does nothing, and that seems unlikely to be correct.
     // We've long had a comment saying that IE doesn't support this.
     // But I do see it in the documentation for Mozilla.
 }
 
 }