Make sure to use CSSValueID and CSSPropertyID rather than integers.

Source/core/css/CSSParser.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.
  *
  * 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.
  */
 
 #ifndef CSSParser_h
 #define CSSParser_h
 
 #include "CSSPropertyNames.h"
+#include "CSSValueKeywords.h"
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/CSSFilterValue.h"
 #include "core/css/CSSGradientValue.h"
 #include "core/css/CSSParserMode.h"
 #include "core/css/CSSParserValues.h"
 #include "core/css/CSSProperty.h"
 #include "core/css/CSSPropertySourceData.h"
 #include "core/css/CSSSelector.h"
 #include "core/css/MediaQuery.h"
 #include "core/page/UseCounter.h"
 #include "core/platform/graphics/Color.h"
-#include <wtf/HashMap.h>
-#include <wtf/HashSet.h>
-#include <wtf/OwnArrayPtr.h>
-#include <wtf/text/AtomicString.h>
-#include <wtf/Vector.h>
+#include "wtf/HashMap.h"
+#include "wtf/HashSet.h"
+#include "wtf/OwnArrayPtr.h"
+#include "wtf/Vector.h"
+#include "wtf/text/AtomicString.h"
 
 namespace WebCore {
 
 class AnimationParseContext;
 class CSSArrayFunctionValue;
 class CSSBorderImageSliceValue;
 class CSSMixFunctionValue;
 class CSSPrimitiveValue;
 class CSSSelectorList;
 class CSSShaderValue;
@@ skipping 37 matching lines @@
     ~CSSParser();
 
     void parseSheet(StyleSheetContents*, const String&, int startLineNumber = 0, SourceDataHandler* = 0, bool = false);
     PassRefPtr<StyleRuleBase> parseRule(StyleSheetContents*, const String&);
     PassRefPtr<StyleKeyframe> parseKeyframeRule(StyleSheetContents*, const String&);
     bool parseSupportsCondition(const String&);
     static bool parseValue(MutableStylePropertySet*, CSSPropertyID, const String&, bool important, CSSParserMode, StyleSheetContents*);
     static bool parseColor(RGBA32& color, const String&, bool strict = false);
     static bool parseSystemColor(RGBA32& color, const String&, Document*);
     static PassRefPtr<CSSValueList> parseFontFaceValue(const AtomicString&);
-    PassRefPtr<CSSPrimitiveValue> parseValidPrimitive(int ident, CSSParserValue*);
+    PassRefPtr<CSSPrimitiveValue> parseValidPrimitive(CSSValueID ident, CSSParserValue*);
     bool parseDeclaration(MutableStylePropertySet*, const String&, SourceDataHandler*, StyleSheetContents* contextStyleSheet);
     static PassRefPtr<ImmutableStylePropertySet> parseInlineStyleDeclaration(const String&, Element*);
     PassOwnPtr<MediaQuery> parseMediaQuery(const String&);
 
     void addPropertyWithPrefixingVariant(CSSPropertyID, PassRefPtr<CSSValue>, bool important, bool implicit = false);
     void addProperty(CSSPropertyID, PassRefPtr<CSSValue>, bool important, bool implicit = false);
     void rollbackLastProperties(int num);
     bool hasProperties() const { return !m_parsedProperties.isEmpty(); }
     void addExpandedPropertyForValue(CSSPropertyID propId, PassRefPtr<CSSValue>, bool);
     void setCurrentProperty(CSSPropertyID);
@@ skipping 546 matching lines @@
     inline unsigned safeUserStringTokenOffset();
 
     UseCounter* m_useCounter;
 
     friend class TransformOperationInfo;
     friend class FilterOperationInfo;
 };
 
 CSSPropertyID cssPropertyID(const CSSParserString&);
 CSSPropertyID cssPropertyID(const String&);
-int cssValueKeywordID(const CSSParserString&);
+CSSValueID cssValueKeywordID(const CSSParserString&);
 
 class ShorthandScope {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     ShorthandScope(CSSParser* parser, CSSPropertyID propId) : m_parser(parser)
     {
         if (!(m_parser->m_inParseShorthand++))
             m_parser->m_currentShorthand = propId;
     }
     ~ShorthandScope()
@@ skipping 59 matching lines @@
 }
 
 inline int cssyylex(void* yylval, CSSParser* parser)
 {
     return parser->lex(yylval);
 }
 
 } // namespace WebCore
 
 #endif // CSSParser_h