Remove some unused includes from core/css and core/dom

Source/core/css/CSSImageValue.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 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.
  *
  * 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/css/CSSImageValue.h"
 
-#include "CSSValueKeywords.h"
-#include "core/css/CSSCursorImageValue.h"
 #include "core/css/CSSParser.h"
 #include "core/dom/Document.h"
-#include "core/dom/Element.h"
 #include "core/dom/WebCoreMemoryInstrumentation.h"
 #include "core/loader/cache/CachedImage.h"
 #include "core/loader/cache/CachedResourceLoader.h"
 #include "core/loader/cache/CachedResourceRequest.h"
 #include "core/loader/cache/CachedResourceRequestInitiators.h"
-#include "core/loader/cache/MemoryCache.h"
 #include "core/rendering/style/StyleCachedImage.h"
 #include "core/rendering/style/StylePendingImage.h"
 
 namespace WebCore {
 
 CSSImageValue::CSSImageValue(const String& url)
     : CSSValue(ImageClass)
     , m_url(url)
     , m_accessedImage(false)
 {
@@ skipping 68 matching lines @@
     info.addMember(m_url, "url");
     // No need to report m_image as it is counted as part of RenderArena.
 }
 
 bool CSSImageValue::knownToBeOpaque(const RenderObject* renderer) const
 {
     return m_image ? m_image->knownToBeOpaque(renderer) : false;
 }
 
 } // namespace WebCore