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diff --git a/Source/WebCore/Modules/indexeddb/server/UniqueIDBDatabaseConnection.h b/Source/WebCore/Modules/indexeddb/server/UniqueIDBDatabaseConnection.h
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+++ b/Source/WebCore/Modules/indexeddb/server/UniqueIDBDatabaseConnection.h
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+/*
+ * Copyright (C) 2015 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 "UniqueIDBDatabaseTransaction.h"
+#include <wtf/HashMap.h>
+#include <wtf/Ref.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+class IDBError;
+class IDBResultData;
+
+namespace IDBServer {
+
+class IDBConnectionToClient;
+class ServerOpenDBRequest;
+class UniqueIDBDatabase;
+class UniqueIDBDatabaseTransaction;
+
+class UniqueIDBDatabaseConnection : public RefCounted<UniqueIDBDatabaseConnection> {
+public:
+    static Ref<UniqueIDBDatabaseConnection> create(UniqueIDBDatabase&, ServerOpenDBRequest&);
+
+    ~UniqueIDBDatabaseConnection();
+
+    uint64_t identifier() const { return m_identifier; }
+    const IDBResourceIdentifier& openRequestIdentifier() { return m_openRequestIdentifier; }
+    UniqueIDBDatabase& database() { return m_database; }
+    IDBConnectionToClient& connectionToClient() { return m_connectionToClient; }
+
+    void connectionPendingCloseFromClient();
+    void connectionClosedFromClient();
+
+    bool closePending() const { return m_closePending; }
+
+    bool hasNonFinishedTransactions() const;
+
+    void fireVersionChangeEvent(const IDBResourceIdentifier& requestIdentifier, uint64_t requestedVersion);
+    UniqueIDBDatabaseTransaction& createVersionChangeTransaction(uint64_t newVersion);
+
+    void establishTransaction(const IDBTransactionInfo&);
+    void didAbortTransaction(UniqueIDBDatabaseTransaction&, const IDBError&);
+    void didCommitTransaction(UniqueIDBDatabaseTransaction&, const IDBError&);
+    void didCreateObjectStore(const IDBResultData&);
+    void didDeleteObjectStore(const IDBResultData&);
+    void didRenameObjectStore(const IDBResultData&);
+    void didClearObjectStore(const IDBResultData&);
+    void didCreateIndex(const IDBResultData&);
+    void didDeleteIndex(const IDBResultData&);
+    void didRenameIndex(const IDBResultData&);
+    void didFireVersionChangeEvent(const IDBResourceIdentifier& requestIdentifier);
+    void didFinishHandlingVersionChange(const IDBResourceIdentifier& transactionIdentifier);
+    void confirmDidCloseFromServer();
+
+    void abortTransactionWithoutCallback(UniqueIDBDatabaseTransaction&);
+
+    bool connectionIsClosing() const;
+
+private:
+    UniqueIDBDatabaseConnection(UniqueIDBDatabase&, ServerOpenDBRequest&);
+
+    uint64_t m_identifier { 0 };
+    UniqueIDBDatabase& m_database;
+    IDBConnectionToClient& m_connectionToClient;
+    IDBResourceIdentifier m_openRequestIdentifier;
+
+    bool m_closePending { false };
+
+    HashMap<IDBResourceIdentifier, RefPtr<UniqueIDBDatabaseTransaction>> m_transactionMap;
+};
+
+} // namespace IDBServer
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)