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diff --git a/Source/WebKit2/DatabaseProcess/DatabaseToWebProcessConnection.h b/Source/WebKit2/DatabaseProcess/DatabaseToWebProcessConnection.h
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+++ b/Source/WebKit2/DatabaseProcess/DatabaseToWebProcessConnection.h
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+/*
+ * Copyright (C) 2013 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.
+ */
+
+#ifndef DatabaseToWebProcessConnection_h
+#define DatabaseToWebProcessConnection_h
+
+#include "Connection.h"
+#include "MessageSender.h"
+
+#include <wtf/HashMap.h>
+
+#if ENABLE(DATABASE_PROCESS)
+
+namespace WebKit {
+
+class WebIDBConnectionToClient;
+
+class DatabaseToWebProcessConnection : public RefCounted<DatabaseToWebProcessConnection>, public IPC::Connection::Client, public IPC::MessageSender {
+public:
+    static Ref<DatabaseToWebProcessConnection> create(IPC::Connection::Identifier);
+    ~DatabaseToWebProcessConnection();
+
+    IPC::Connection& connection() { return m_connection.get(); }
+
+private:
+    DatabaseToWebProcessConnection(IPC::Connection::Identifier);
+
+    // IPC::Connection::Client
+    void didReceiveMessage(IPC::Connection&, IPC::Decoder&) override;
+    void didReceiveSyncMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder>&) override;
+    void didClose(IPC::Connection&) override;
+    void didReceiveInvalidMessage(IPC::Connection&, IPC::StringReference messageReceiverName, IPC::StringReference messageName) override;
+    void didReceiveDatabaseToWebProcessConnectionMessage(IPC::Connection&, IPC::Decoder&);
+    void didReceiveSyncDatabaseToWebProcessConnectionMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder>&);
+
+    // IPC::MessageSender
+    IPC::Connection* messageSenderConnection() override { return m_connection.ptr(); }
+    uint64_t messageSenderDestinationID() override { return 0; }
+
+#if ENABLE(INDEXED_DATABASE)
+    // Messages handlers (Modern IDB)
+    void establishIDBConnectionToServer(uint64_t& serverConnectionIdentifier);
+    void removeIDBConnectionToServer(uint64_t serverConnectionIdentifier);
+
+    HashMap<uint64_t, RefPtr<WebIDBConnectionToClient>> m_webIDBConnections;
+#endif // ENABLE(INDEXED_DATABASE)
+
+    Ref<IPC::Connection> m_connection;
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(DATABASE_PROCESS)
+#endif // DatabaseToWebProcessConnection_h