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

Source/core/html/HTMLLinkElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google 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 16 matching lines @@
 #include "core/css/CSSStyleSheet.h"
 #include "core/dom/IconURL.h"
 #include "core/html/DOMSettableTokenList.h"
 #include "core/html/HTMLElement.h"
 #include "core/html/LinkRelAttribute.h"
 #include "core/html/LinkResource.h"
 #include "core/loader/LinkLoader.h"
 #include "core/loader/LinkLoaderClient.h"
 #include "core/loader/cache/CachedResourceHandle.h"
 #include "core/loader/cache/CachedStyleSheetClient.h"
-#include "core/platform/Timer.h"
 
 namespace WebCore {
 
 class DocumentFragment;
 class HTMLLinkElement;
 class KURL;
 class LinkImport;
 
 template<typename T> class EventSender;
 typedef EventSender<HTMLLinkElement> LinkEventSender;
@@ skipping 152 matching lines @@
     LinkRelAttribute m_relAttribute;
 
     bool m_createdByParser;
     bool m_isInShadowTree;
     int m_beforeLoadRecurseCount;
 };
 
 } //namespace
 
 #endif