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diff --git a/Source/JavaScriptCore/parser/SourceProvider.h b/Source/JavaScriptCore/parser/SourceProvider.h
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+/*
+ * Copyright (C) 2008, 2009 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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * 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 SourceProvider_h
+#define SourceProvider_h
+
+#include "UString.h"
+#include <wtf/RefCounted.h>
+
+namespace JSC {
+
+    class SourceProvider : public RefCounted<SourceProvider> {
+    public:
+        SourceProvider(const UString& url)
+            : m_url(url)
+            , m_validated(false)
+        {
+        }
+        virtual ~SourceProvider() { }
+
+        virtual UString getRange(int start, int end) const = 0;
+        virtual const UChar* data() const = 0;
+        virtual int length() const = 0;
+        
+        const UString& url() { return m_url; }
+        intptr_t asID() { return reinterpret_cast<intptr_t>(this); }
+
+        bool isValid() const { return m_validated; }
+        void setValid() { m_validated = true; }
+
+    private:
+        UString m_url;
+        bool m_validated;
+    };
+
+    class UStringSourceProvider : public SourceProvider {
+    public:
+        static PassRefPtr<UStringSourceProvider> create(const UString& source, const UString& url)
+        {
+            return adoptRef(new UStringSourceProvider(source, url));
+        }
+
+        UString getRange(int start, int end) const
+        {
+            return m_source.substringSharingImpl(start, end - start);
+        }
+        const UChar* data() const { return m_source.characters(); }
+        int length() const { return m_source.length(); }
+
+    private:
+        UStringSourceProvider(const UString& source, const UString& url)
+            : SourceProvider(url)
+            , m_source(source)
+        {
+        }
+
+        UString m_source;
+    };
+    
+} // namespace JSC
+
+#endif // SourceProvider_h