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diff --git a/Source/WebCore/Modules/indexeddb/shared/InProcessIDBServer.h b/Source/WebCore/Modules/indexeddb/shared/InProcessIDBServer.h
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+++ b/Source/WebCore/Modules/indexeddb/shared/InProcessIDBServer.h
@@ -0,0 +1,131 @@
+/*
+ * 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 "IDBConnectionToClient.h"
+#include "IDBConnectionToServer.h"
+#include "IDBOpenDBRequest.h"
+#include "IDBServer.h"
+#include <wtf/HashMap.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+namespace IDBClient {
+class IDBConnectionToServer;
+}
+
+namespace IDBServer {
+class IDBServer;
+}
+
+class InProcessIDBServer final : public IDBClient::IDBConnectionToServerDelegate, public IDBServer::IDBConnectionToClientDelegate, public RefCounted<InProcessIDBServer>, public IDBServer::IDBBackingStoreTemporaryFileHandler {
+public:
+    WEBCORE_EXPORT static Ref<InProcessIDBServer> create();
+    WEBCORE_EXPORT static Ref<InProcessIDBServer> create(const String& databaseDirectoryPath);
+
+    WEBCORE_EXPORT IDBClient::IDBConnectionToServer& connectionToServer() const;
+    IDBServer::IDBConnectionToClient& connectionToClient() const;
+    IDBServer::IDBServer& server() { return m_server.get(); }
+
+    IDBServer::IDBServer& idbServer() { return m_server.get(); }
+
+    // IDBConnectionToServer
+    void deleteDatabase(const IDBRequestData&) final;
+    void openDatabase(const IDBRequestData&) final;
+    void abortTransaction(const IDBResourceIdentifier&) final;
+    void commitTransaction(const IDBResourceIdentifier&) final;
+    void didFinishHandlingVersionChangeTransaction(uint64_t databaseConnectionIdentifier, const IDBResourceIdentifier&) final;
+    void createObjectStore(const IDBRequestData&, const IDBObjectStoreInfo&) final;
+    void deleteObjectStore(const IDBRequestData&, const String& objectStoreName) final;
+    void renameObjectStore(const IDBRequestData&, uint64_t objectStoreIdentifier, const String& newName) final;
+    void clearObjectStore(const IDBRequestData&, uint64_t objectStoreIdentifier) final;
+    void createIndex(const IDBRequestData&, const IDBIndexInfo&) final;
+    void deleteIndex(const IDBRequestData&, uint64_t objectStoreIdentifier, const String& indexName) final;
+    void renameIndex(const IDBRequestData&, uint64_t objectStoreIdentifier, uint64_t indexIdentifier, const String& newName) final;
+    void putOrAdd(const IDBRequestData&, const IDBKeyData&, const IDBValue&, const IndexedDB::ObjectStoreOverwriteMode) final;
+    void getRecord(const IDBRequestData&, const IDBGetRecordData&) final;
+    void getAllRecords(const IDBRequestData&, const IDBGetAllRecordsData&) final;
+    void getCount(const IDBRequestData&, const IDBKeyRangeData&) final;
+    void deleteRecord(const IDBRequestData&, const IDBKeyRangeData&) final;
+    void openCursor(const IDBRequestData&, const IDBCursorInfo&) final;
+    void iterateCursor(const IDBRequestData&, const IDBIterateCursorData&) final;
+    void establishTransaction(uint64_t databaseConnectionIdentifier, const IDBTransactionInfo&) final;
+    void databaseConnectionPendingClose(uint64_t databaseConnectionIdentifier) final;
+    void databaseConnectionClosed(uint64_t databaseConnectionIdentifier) final;
+    void abortOpenAndUpgradeNeeded(uint64_t databaseConnectionIdentifier, const IDBResourceIdentifier& transactionIdentifier) final;
+    void didFireVersionChangeEvent(uint64_t databaseConnectionIdentifier, const IDBResourceIdentifier& requestIdentifier) final;
+    void openDBRequestCancelled(const IDBRequestData&) final;
+    void confirmDidCloseFromServer(uint64_t databaseConnectionIdentifier) final;
+    void getAllDatabaseNames(const SecurityOriginData& mainFrameOrigin, const SecurityOriginData& openingOrigin, uint64_t callbackID) final;
+
+    // IDBConnectionToClient
+    uint64_t identifier() const override;
+    void didDeleteDatabase(const IDBResultData&) final;
+    void didOpenDatabase(const IDBResultData&) final;
+    void didAbortTransaction(const IDBResourceIdentifier& transactionIdentifier, const IDBError&) final;
+    void didCommitTransaction(const IDBResourceIdentifier& transactionIdentifier, const IDBError&) final;
+    void didCreateObjectStore(const IDBResultData&) final;
+    void didDeleteObjectStore(const IDBResultData&) final;
+    void didRenameObjectStore(const IDBResultData&) final;
+    void didClearObjectStore(const IDBResultData&) final;
+    void didCreateIndex(const IDBResultData&) final;
+    void didDeleteIndex(const IDBResultData&) final;
+    void didRenameIndex(const IDBResultData&) final;
+    void didPutOrAdd(const IDBResultData&) final;
+    void didGetRecord(const IDBResultData&) final;
+    void didGetAllRecords(const IDBResultData&) final;
+    void didGetCount(const IDBResultData&) final;
+    void didDeleteRecord(const IDBResultData&) final;
+    void didOpenCursor(const IDBResultData&) final;
+    void didIterateCursor(const IDBResultData&) final;
+    void fireVersionChangeEvent(IDBServer::UniqueIDBDatabaseConnection&, const IDBResourceIdentifier& requestIdentifier, uint64_t requestedVersion) final;
+    void didStartTransaction(const IDBResourceIdentifier& transactionIdentifier, const IDBError&) final;
+    void didCloseFromServer(IDBServer::UniqueIDBDatabaseConnection&, const IDBError&) final;
+    void notifyOpenDBRequestBlocked(const IDBResourceIdentifier& requestIdentifier, uint64_t oldVersion, uint64_t newVersion) final;
+    void didGetAllDatabaseNames(uint64_t callbackID, const Vector<String>& databaseNames) final;
+
+    void ref() override { RefCounted<InProcessIDBServer>::ref(); }
+    void deref() override { RefCounted<InProcessIDBServer>::deref(); }
+
+    void prepareForAccessToTemporaryFile(const String&) override { }
+    void accessToTemporaryFileComplete(const String& path) override;
+
+private:
+    InProcessIDBServer();
+    InProcessIDBServer(const String& databaseDirectoryPath);
+
+    Ref<IDBServer::IDBServer> m_server;
+    RefPtr<IDBClient::IDBConnectionToServer> m_connectionToServer;
+    RefPtr<IDBServer::IDBConnectionToClient> m_connectionToClient;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)