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

Source/core/css/StylePropertySet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. 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/StylePropertySet.h"
 
-#include "CSSValueKeywords.h"
 #include "core/css/CSSParser.h"
-#include "core/css/CSSValueList.h"
 #include "core/css/CSSValuePool.h"
 #include "core/css/CSSVariableValue.h"
 #include "core/css/PropertySetCSSStyleDeclaration.h"
 #include "core/css/StylePropertySerializer.h"
 #include "core/css/StylePropertyShorthand.h"
 #include "core/css/StyleSheetContents.h"
-#include "core/dom/Document.h"
 #include "core/page/RuntimeCSSEnabled.h"
 #include <wtf/BitArray.h>
 #include <wtf/MemoryInstrumentationVector.h>
 #include <wtf/text/StringBuilder.h>
 
 #ifndef NDEBUG
 #include <stdio.h>
 #include <wtf/ASCIICType.h>
 #include <wtf/text/CString.h>
 #endif
@@ skipping 567 matching lines @@
     result.appendLiteral(": ");
     result.append(propertyValue()->cssText());
     if (isImportant())
         result.appendLiteral(" !important");
     result.append(';');
     return result.toString();
 }
 
 
 } // namespace WebCore