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diff --git a/Source/WebKit2/DatabaseProcess/IndexedDB/WebIDBConnectionToClient.h b/Source/WebKit2/DatabaseProcess/IndexedDB/WebIDBConnectionToClient.h
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+++ b/Source/WebKit2/DatabaseProcess/IndexedDB/WebIDBConnectionToClient.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 "DatabaseToWebProcessConnection.h"
+#include "MessageSender.h"
+#include <WebCore/IDBConnectionToClient.h>
+
+namespace WebCore {
+class IDBCursorInfo;
+class IDBIndexInfo;
+class IDBKeyData;
+class IDBObjectStoreInfo;
+class IDBRequestData;
+class IDBTransactionInfo;
+class IDBValue;
+class SerializedScriptValue;
+struct IDBGetAllRecordsData;
+struct IDBGetRecordData;
+struct IDBIterateCursorData;
+struct IDBKeyRangeData;
+struct SecurityOriginData;
+}
+
+namespace WebKit {
+
+class WebIDBConnectionToClient final : public WebCore::IDBServer::IDBConnectionToClientDelegate, public IPC::MessageSender, public RefCounted<WebIDBConnectionToClient> {
+public:
+    static Ref<WebIDBConnectionToClient> create(DatabaseToWebProcessConnection&, uint64_t serverConnectionIdentifier);
+
+    virtual ~WebIDBConnectionToClient();
+
+    WebCore::IDBServer::IDBConnectionToClient& connectionToClient();
+    uint64_t identifier() const final { return m_identifier; }
+    uint64_t messageSenderDestinationID() final { return m_identifier; }
+
+    // IDBConnectionToClientDelegate
+    void didDeleteDatabase(const WebCore::IDBResultData&) final;
+    void didOpenDatabase(const WebCore::IDBResultData&) final;
+    void didAbortTransaction(const WebCore::IDBResourceIdentifier& transactionIdentifier, const WebCore::IDBError&) final;
+    void didCommitTransaction(const WebCore::IDBResourceIdentifier& transactionIdentifier, const WebCore::IDBError&) final;
+    void didCreateObjectStore(const WebCore::IDBResultData&) final;
+    void didDeleteObjectStore(const WebCore::IDBResultData&) final;
+    void didRenameObjectStore(const WebCore::IDBResultData&) final;
+    void didClearObjectStore(const WebCore::IDBResultData&) final;
+    void didCreateIndex(const WebCore::IDBResultData&) final;
+    void didDeleteIndex(const WebCore::IDBResultData&) final;
+    void didRenameIndex(const WebCore::IDBResultData&) final;
+    void didPutOrAdd(const WebCore::IDBResultData&) final;
+    void didGetRecord(const WebCore::IDBResultData&) final;
+    void didGetAllRecords(const WebCore::IDBResultData&) final;
+    void didGetCount(const WebCore::IDBResultData&) final;
+    void didDeleteRecord(const WebCore::IDBResultData&) final;
+    void didOpenCursor(const WebCore::IDBResultData&) final;
+    void didIterateCursor(const WebCore::IDBResultData&) final;
+
+    void fireVersionChangeEvent(WebCore::IDBServer::UniqueIDBDatabaseConnection&, const WebCore::IDBResourceIdentifier& requestIdentifier, uint64_t requestedVersion) final;
+    void didStartTransaction(const WebCore::IDBResourceIdentifier& transactionIdentifier, const WebCore::IDBError&) final;
+    void didCloseFromServer(WebCore::IDBServer::UniqueIDBDatabaseConnection&, const WebCore::IDBError&) final;
+    void notifyOpenDBRequestBlocked(const WebCore::IDBResourceIdentifier& requestIdentifier, uint64_t oldVersion, uint64_t newVersion) final;
+
+    void didGetAllDatabaseNames(uint64_t callbackID, const Vector<String>& databaseNames) final;
+
+    void ref() override { RefCounted<WebIDBConnectionToClient>::ref(); }
+    void deref() override { RefCounted<WebIDBConnectionToClient>::deref(); }
+
+    // Messages received from WebProcess
+    void deleteDatabase(const WebCore::IDBRequestData&);
+    void openDatabase(const WebCore::IDBRequestData&);
+    void abortTransaction(const WebCore::IDBResourceIdentifier&);
+    void commitTransaction(const WebCore::IDBResourceIdentifier&);
+    void didFinishHandlingVersionChangeTransaction(uint64_t databaseConnectionIdentifier, const WebCore::IDBResourceIdentifier&);
+    void createObjectStore(const WebCore::IDBRequestData&, const WebCore::IDBObjectStoreInfo&);
+    void deleteObjectStore(const WebCore::IDBRequestData&, const String& objectStoreName);
+    void renameObjectStore(const WebCore::IDBRequestData&, uint64_t objectStoreIdentifier, const String& newName);
+    void clearObjectStore(const WebCore::IDBRequestData&, uint64_t objectStoreIdentifier);
+    void createIndex(const WebCore::IDBRequestData&, const WebCore::IDBIndexInfo&);
+    void deleteIndex(const WebCore::IDBRequestData&, uint64_t objectStoreIdentifier, const String& indexName);
+    void renameIndex(const WebCore::IDBRequestData&, uint64_t objectStoreIdentifier, uint64_t indexIdentifier, const String& newName);
+    void putOrAdd(const WebCore::IDBRequestData&, const WebCore::IDBKeyData&, const WebCore::IDBValue&, unsigned overwriteMode);
+    void getRecord(const WebCore::IDBRequestData&, const WebCore::IDBGetRecordData&);
+    void getAllRecords(const WebCore::IDBRequestData&, const WebCore::IDBGetAllRecordsData&);
+    void getCount(const WebCore::IDBRequestData&, const WebCore::IDBKeyRangeData&);
+    void deleteRecord(const WebCore::IDBRequestData&, const WebCore::IDBKeyRangeData&);
+    void openCursor(const WebCore::IDBRequestData&, const WebCore::IDBCursorInfo&);
+    void iterateCursor(const WebCore::IDBRequestData&, const WebCore::IDBIterateCursorData&);
+
+    void establishTransaction(uint64_t databaseConnectionIdentifier, const WebCore::IDBTransactionInfo&);
+    void databaseConnectionPendingClose(uint64_t databaseConnectionIdentifier);
+    void databaseConnectionClosed(uint64_t databaseConnectionIdentifier);
+    void abortOpenAndUpgradeNeeded(uint64_t databaseConnectionIdentifier, const WebCore::IDBResourceIdentifier& transactionIdentifier);
+    void didFireVersionChangeEvent(uint64_t databaseConnectionIdentifier, const WebCore::IDBResourceIdentifier& requestIdentifier);
+    void openDBRequestCancelled(const WebCore::IDBRequestData&);
+    void confirmDidCloseFromServer(uint64_t databaseConnectionIdentifier);
+
+    void getAllDatabaseNames(uint64_t serverConnectionIdentifier, const WebCore::SecurityOriginData& topOrigin, const WebCore::SecurityOriginData& openingOrigin, uint64_t callbackID);
+
+    void disconnectedFromWebProcess();
+
+    void didReceiveMessage(IPC::Connection&, IPC::Decoder&);
+
+private:
+    WebIDBConnectionToClient(DatabaseToWebProcessConnection&, uint64_t serverConnectionIdentifier);
+
+    IPC::Connection* messageSenderConnection() final;
+
+    template<class MessageType> void handleGetResult(const WebCore::IDBResultData&);
+
+    Ref<DatabaseToWebProcessConnection> m_connection;
+
+    uint64_t m_identifier;
+    RefPtr<WebCore::IDBServer::IDBConnectionToClient> m_connectionToClient;
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(INDEXED_DATABASE)