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diff --git a/Source/WebCore/css/CSSPrimitiveValueCache.h b/Source/WebCore/css/CSSPrimitiveValueCache.h
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+/*
+ * Copyright (C) 2011 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 CSSPrimitiveValueCache_h
+#define CSSPrimitiveValueCache_h
+
+#include "CSSPrimitiveValue.h"
+#include "CSSValueKeywords.h"
+#include <wtf/HashMap.h>
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+    
+class CSSPrimitiveValue;
+
+class CSSPrimitiveValueCache : public RefCounted<CSSPrimitiveValueCache> {
+public:
+    static PassRefPtr<CSSPrimitiveValueCache> create() { return adoptRef(new CSSPrimitiveValueCache); }
+    ~CSSPrimitiveValueCache();
+
+    PassRefPtr<CSSPrimitiveValue> createIdentifierValue(int identifier);
+    PassRefPtr<CSSPrimitiveValue> createColorValue(unsigned rgbValue);
+    PassRefPtr<CSSPrimitiveValue> createValue(double value, CSSPrimitiveValue::UnitTypes);
+    PassRefPtr<CSSPrimitiveValue> createValue(String value, CSSPrimitiveValue::UnitTypes type) { return CSSPrimitiveValue::create(value, type); }
+    template<typename T> static PassRefPtr<CSSPrimitiveValue> createValue(T value) { return CSSPrimitiveValue::create(value); }
+    
+private:
+    CSSPrimitiveValueCache();
+
+    typedef HashMap<int, RefPtr<CSSPrimitiveValue> > IdentifierValueCache;
+    IdentifierValueCache m_identifierValueCache;
+
+    typedef HashMap<unsigned, RefPtr<CSSPrimitiveValue> > ColorValueCache;
+    ColorValueCache m_colorValueCache;
+    RefPtr<CSSPrimitiveValue> m_colorTransparent;
+    RefPtr<CSSPrimitiveValue> m_colorWhite;
+    RefPtr<CSSPrimitiveValue> m_colorBlack;
+    
+    typedef HashMap<int, RefPtr<CSSPrimitiveValue> > IntegerValueCache;
+    RefPtr<CSSPrimitiveValue> m_pixelZero;
+    RefPtr<CSSPrimitiveValue> m_percentZero;
+    RefPtr<CSSPrimitiveValue> m_numberZero;
+    IntegerValueCache m_pixelValueCache;
+    IntegerValueCache m_percentValueCache;
+    IntegerValueCache m_numberValueCache;
+};
+
+}
+
+#endif