Make sure to use CSSValueID and CSSPropertyID rather than integers.

Source/core/css/CSSValuePool.h

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CSSValuePool_h
 #define CSSValuePool_h
 
+#include "CSSPropertyNames.h"
 #include "CSSValueKeywords.h"
 #include "core/css/CSSInheritedValue.h"
 #include "core/css/CSSInitialValue.h"
 #include "core/css/CSSPrimitiveValue.h"
-#include <wtf/HashMap.h>
-#include <wtf/RefPtr.h>
-#include <wtf/text/AtomicStringHash.h>
+#include "wtf/HashMap.h"
+#include "wtf/RefPtr.h"
+#include "wtf/text/AtomicStringHash.h"
 
 namespace WebCore {
 
 class CSSValueList;
 
 class CSSValuePool {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     PassRefPtr<CSSValueList> createFontFaceValue(const AtomicString&);
     PassRefPtr<CSSPrimitiveValue> createFontFamilyValue(const String&);
     PassRefPtr<CSSInheritedValue> createInheritedValue() { return m_inheritedValue; }
     PassRefPtr<CSSInitialValue> createImplicitInitialValue() { return m_implicitInitialValue; }
     PassRefPtr<CSSInitialValue> createExplicitInitialValue() { return m_explicitInitialValue; }
-    PassRefPtr<CSSPrimitiveValue> createIdentifierValue(int identifier);
+    PassRefPtr<CSSPrimitiveValue> createIdentifierValue(CSSValueID identifier);
+    PassRefPtr<CSSPrimitiveValue> createIdentifierValue(CSSPropertyID identifier);
     PassRefPtr<CSSPrimitiveValue> createColorValue(unsigned rgbValue);
     PassRefPtr<CSSPrimitiveValue> createValue(double value, CSSPrimitiveValue::UnitTypes);
     PassRefPtr<CSSPrimitiveValue> createValue(const String& value, CSSPrimitiveValue::UnitTypes type) { return CSSPrimitiveValue::create(value, type); }
     template<typename T> static PassRefPtr<CSSPrimitiveValue> createValue(T value) { return CSSPrimitiveValue::create(value); }
 
     void drain();
 
 private:
     CSSValuePool();
 
@@ skipping 22 matching lines @@
     FontFamilyValueCache m_fontFamilyValueCache;
 
     friend CSSValuePool& cssValuePool();
 };
 
 CSSValuePool& cssValuePool();
 
 }
 
 #endif