Remove unnecessary forward declarations from CSSPropertyParser.h

Source/core/css/parser/CSSPropertyParser.h

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 - 2010  Torch Mobile (Beijing) Co. Ltd. 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 23 matching lines @@
 #include "core/css/CSSParserValues.h"
 #include "core/css/CSSProperty.h"
 #include "core/css/CSSPropertySourceData.h"
 #include "core/css/CSSSelector.h"
 #include "platform/graphics/Color.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
-// FIXME: Many of these may not be used.
-class CSSArrayFunctionValue;
 class CSSBorderImageSliceValue;
 class CSSPrimitiveValue;
-class CSSSelectorList;
 class CSSValue;
 class CSSValueList;
 class CSSBasicShape;
 class CSSBasicShapeInset;
 class CSSGridLineNamesValue;
-class Document;
-class Element;
 class ImmutableStylePropertySet;
-class StyleKeyframe;
 class StylePropertyShorthand;
-class StyleKeyframe;
 class UseCounter;
 
 // Inputs: PropertyID, isImportant bool, CSSParserValueList.
 // Outputs: Vector of CSSProperties
 
 class CSSPropertyParser {
     STACK_ALLOCATED();
 public:
     CSSPropertyParser(OwnPtr<CSSParserValueList>&,
         const CSSParserContext&, bool inViewport, bool savedImportant,
@@ skipping 331 matching lines @@
 CSSPropertyID cssPropertyID(const CSSParserString&);
 CSSPropertyID cssPropertyID(const String&);
 CSSValueID cssValueKeywordID(const CSSParserString&);
 
 bool isKeywordPropertyID(CSSPropertyID);
 bool isValidKeywordPropertyAndValue(CSSPropertyID, CSSValueID, const CSSParserContext&);
 
 } // namespace WebCore
 
 #endif // CSSPropertyParser_h