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diff --git a/WebCore/storage/IDBKey.h b/WebCore/storage/IDBKey.h
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+/*
+ * Copyright (C) 2010 Google 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 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 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 IDBKey_h
+#define IDBKey_h
+
+#include "PlatformString.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+
+#if ENABLE(INDEXED_DATABASE)
+
+namespace WebCore {
+
+// FIXME: Add dates.
+class IDBKey : public RefCounted<IDBKey> {
+public:
+    static PassRefPtr<IDBKey> create()
+    {
+        return adoptRef(new IDBKey());
+    }
+    static PassRefPtr<IDBKey> create(int32_t number)
+    {
+        return adoptRef(new IDBKey(number));
+    }
+    static PassRefPtr<IDBKey> create(const String& string)
+    {
+        return adoptRef(new IDBKey(string));
+    }
+    ~IDBKey() { }
+
+    // In order of the least to the most precident in terms of sort order.
+    enum Type {
+        NullType = 0,
+        StringType,
+        NumberType
+    };
+
+    Type type() const { return m_type; }
+
+    const String& string() const
+    {
+        ASSERT(m_type == StringType);
+        return m_string;
+    }
+
+    int32_t number() const
+    {
+        ASSERT(m_type == NumberType);
+        return m_number;
+    }
+
+private:
+    IDBKey();
+    explicit IDBKey(int32_t);
+    explicit IDBKey(const String&);
+
+    Type m_type;
+    String m_string;
+    int32_t m_number;
+};
+
+}
+
+#endif // ENABLE(INDEXED_DATABASE)
+
+#endif // IDBKey_h