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diff --git a/Source/WebCore/Modules/indexeddb/IDBValue.h b/Source/WebCore/Modules/indexeddb/IDBValue.h
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+++ b/Source/WebCore/Modules/indexeddb/IDBValue.h
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+/*
+ * Copyright (C) 2016 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.
+ */
+
+#pragma once
+#if ENABLE(INDEXED_DATABASE)
+
+#include "ThreadSafeDataBuffer.h"
+#include <wtf/text/WTFString.h>
+
+namespace WebCore {
+
+class SerializedScriptValue;
+
+class IDBValue {
+public:
+    WEBCORE_EXPORT IDBValue();
+    IDBValue(const SerializedScriptValue&);
+    IDBValue(const ThreadSafeDataBuffer&);
+    IDBValue(const SerializedScriptValue&, const Vector<String>& blobURLs, const Vector<String>& blobFilePaths);
+    IDBValue(const ThreadSafeDataBuffer&, Vector<String>&& blobURLs, Vector<String>&& blobFilePaths);
+    IDBValue(const ThreadSafeDataBuffer&, const Vector<String>& blobURLs, const Vector<String>& blobFilePaths);
+
+    void setAsIsolatedCopy(const IDBValue&);
+    IDBValue isolatedCopy() const;
+
+    const ThreadSafeDataBuffer& data() const { return m_data; }
+    const Vector<String>& blobURLs() const { return m_blobURLs; }
+    const Vector<String>& blobFilePaths() const { return m_blobFilePaths; }
+
+    template<class Encoder> void encode(Encoder&) const;
+    template<class Decoder> static bool decode(Decoder&, IDBValue&);
+
+private:
+    ThreadSafeDataBuffer m_data;
+    Vector<String> m_blobURLs;
+    Vector<String> m_blobFilePaths;
+};
+
+
+template<class Encoder>
+void IDBValue::encode(Encoder& encoder) const
+{
+    encoder << m_data;
+    encoder << m_blobURLs;
+    encoder << m_blobFilePaths;
+}
+
+template<class Decoder>
+bool IDBValue::decode(Decoder& decoder, IDBValue& result)
+{
+    if (!decoder.decode(result.m_data))
+        return false;
+
+    if (!decoder.decode(result.m_blobURLs))
+        return false;
+
+    if (!decoder.decode(result.m_blobFilePaths))
+        return false;
+
+    return true;
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)