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diff --git a/Source/WebCore/Modules/indexeddb/IDBValue.cpp b/Source/WebCore/Modules/indexeddb/IDBValue.cpp
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+++ b/Source/WebCore/Modules/indexeddb/IDBValue.cpp
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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.
+ */
+
+#include "config.h"
+#include "IDBValue.h"
+
+#if ENABLE(INDEXED_DATABASE)
+
+#include "SerializedScriptValue.h"
+#include <wtf/CrossThreadTask.h>
+
+namespace WebCore {
+
+IDBValue::IDBValue()
+{
+}
+
+IDBValue::IDBValue(const SerializedScriptValue& scriptValue)
+    : m_data(ThreadSafeDataBuffer::copyVector(scriptValue.data()))
+    , m_blobURLs(scriptValue.blobURLsIsolatedCopy())
+{
+}
+
+IDBValue::IDBValue(const ThreadSafeDataBuffer& value)
+    : m_data(value)
+{
+}
+
+IDBValue::IDBValue(const SerializedScriptValue& scriptValue, const Vector<String>& blobURLs, const Vector<String>& blobFilePaths)
+    : m_data(ThreadSafeDataBuffer::copyVector(scriptValue.data()))
+    , m_blobURLs(blobURLs)
+    , m_blobFilePaths(blobFilePaths)
+{
+    ASSERT(m_data.data());
+}
+
+IDBValue::IDBValue(const ThreadSafeDataBuffer& value, Vector<String>&& blobURLs, Vector<String>&& blobFilePaths)
+    : m_data(value)
+    , m_blobURLs(WTFMove(blobURLs))
+    , m_blobFilePaths(WTFMove(blobFilePaths))
+{
+}
+
+IDBValue::IDBValue(const ThreadSafeDataBuffer& value, const Vector<String>& blobURLs, const Vector<String>& blobFilePaths)
+    : m_data(value)
+    , m_blobURLs(blobURLs)
+    , m_blobFilePaths(blobFilePaths)
+{
+}
+
+void IDBValue::setAsIsolatedCopy(const IDBValue& other)
+{
+    ASSERT(m_blobURLs.isEmpty() && m_blobFilePaths.isEmpty());
+
+    m_data = other.m_data;
+    m_blobURLs = CrossThreadCopier<Vector<String>>::copy(other.m_blobURLs);
+    m_blobFilePaths = CrossThreadCopier<Vector<String>>::copy(other.m_blobFilePaths);
+}
+
+IDBValue IDBValue::isolatedCopy() const
+{
+    IDBValue result;
+    result.setAsIsolatedCopy(*this);
+    return result;
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)