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diff --git a/Source/WebCore/Modules/indexeddb/server/SQLiteIDBBackingStore.h b/Source/WebCore/Modules/indexeddb/server/SQLiteIDBBackingStore.h
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+++ b/Source/WebCore/Modules/indexeddb/server/SQLiteIDBBackingStore.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 "IDBBackingStore.h"
+#include "IDBDatabaseIdentifier.h"
+#include "IDBDatabaseInfo.h"
+#include "IDBResourceIdentifier.h"
+#include "SQLiteIDBTransaction.h"
+#include <JavaScriptCore/Strong.h>
+#include <wtf/HashMap.h>
+
+namespace WebCore {
+
+class IndexKey;
+class SQLiteDatabase;
+class SQLiteStatement;
+
+namespace IDBServer {
+
+class SQLiteIDBCursor;
+
+class SQLiteIDBBackingStore : public IDBBackingStore {
+public:
+    SQLiteIDBBackingStore(const IDBDatabaseIdentifier&, const String& databaseRootDirectory, IDBBackingStoreTemporaryFileHandler&);
+    
+    ~SQLiteIDBBackingStore() final;
+
+    IDBError getOrEstablishDatabaseInfo(IDBDatabaseInfo&) final;
+
+    IDBError beginTransaction(const IDBTransactionInfo&) final;
+    IDBError abortTransaction(const IDBResourceIdentifier& transactionIdentifier) final;
+    IDBError commitTransaction(const IDBResourceIdentifier& transactionIdentifier) final;
+    IDBError createObjectStore(const IDBResourceIdentifier& transactionIdentifier, const IDBObjectStoreInfo&) final;
+    IDBError deleteObjectStore(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier) final;
+    IDBError renameObjectStore(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, const String& newName) final;
+    IDBError clearObjectStore(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier) final;
+    IDBError createIndex(const IDBResourceIdentifier& transactionIdentifier, const IDBIndexInfo&) final;
+    IDBError deleteIndex(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, uint64_t indexIdentifier) final;
+    IDBError renameIndex(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, uint64_t indexIdentifier, const String& newName) final;
+    IDBError keyExistsInObjectStore(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, const IDBKeyData&, bool& keyExists) final;
+    IDBError deleteRange(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, const IDBKeyRangeData&) final;
+    IDBError addRecord(const IDBResourceIdentifier& transactionIdentifier, const IDBObjectStoreInfo&, const IDBKeyData&, const IDBValue&) final;
+    IDBError getRecord(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, const IDBKeyRangeData&, IDBGetRecordDataType, IDBGetResult& outValue) final;
+    IDBError getAllRecords(const IDBResourceIdentifier& transactionIdentifier, const IDBGetAllRecordsData&, IDBGetAllResult& outValue) final;
+    IDBError getIndexRecord(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, uint64_t indexIdentifier, IndexedDB::IndexRecordType, const IDBKeyRangeData&, IDBGetResult& outValue) final;
+    IDBError getCount(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, uint64_t indexIdentifier, const IDBKeyRangeData&, uint64_t& outCount) final;
+    IDBError generateKeyNumber(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, uint64_t& keyNumber) final;
+    IDBError revertGeneratedKeyNumber(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, uint64_t keyNumber) final;
+    IDBError maybeUpdateKeyGeneratorNumber(const IDBResourceIdentifier& transactionIdentifier, uint64_t objectStoreIdentifier, double newKeyNumber) final;
+    IDBError openCursor(const IDBResourceIdentifier& transactionIdentifier, const IDBCursorInfo&, IDBGetResult& outResult) final;
+    IDBError iterateCursor(const IDBResourceIdentifier& transactionIdentifier, const IDBResourceIdentifier& cursorIdentifier, const IDBIterateCursorData&, IDBGetResult& outResult) final;
+    bool prefetchCursor(const IDBResourceIdentifier&, const IDBResourceIdentifier&) final;
+
+    IDBObjectStoreInfo* infoForObjectStore(uint64_t objectStoreIdentifier) final;
+    void deleteBackingStore() final;
+
+    bool supportsSimultaneousTransactions() final { return false; }
+    bool isEphemeral() final { return false; }
+
+    void unregisterCursor(SQLiteIDBCursor&);
+
+    String fullDatabaseDirectory() const;
+
+    IDBBackingStoreTemporaryFileHandler& temporaryFileHandler() const { return m_temporaryFileHandler; }
+
+    IDBError getBlobRecordsForObjectStoreRecord(int64_t objectStoreRecord, Vector<String>& blobURLs, Vector<String>& blobFilePaths);
+
+    static String databaseNameFromEncodedFilename(const String&);
+
+private:
+    String filenameForDatabaseName() const;
+    String fullDatabasePath() const;
+
+    bool ensureValidRecordsTable();
+    bool ensureValidIndexRecordsTable();
+    bool ensureValidIndexRecordsIndex();
+    bool ensureValidBlobTables();
+    std::unique_ptr<IDBDatabaseInfo> createAndPopulateInitialDatabaseInfo();
+    std::unique_ptr<IDBDatabaseInfo> extractExistingDatabaseInfo();
+
+    IDBError deleteRecord(SQLiteIDBTransaction&, int64_t objectStoreID, const IDBKeyData&);
+    IDBError uncheckedGetKeyGeneratorValue(int64_t objectStoreID, uint64_t& outValue);
+    IDBError uncheckedSetKeyGeneratorValue(int64_t objectStoreID, uint64_t value);
+
+    IDBError updateAllIndexesForAddRecord(const IDBObjectStoreInfo&, const IDBKeyData&, const ThreadSafeDataBuffer& value, int64_t recordID);
+    IDBError updateOneIndexForAddRecord(const IDBIndexInfo&, const IDBKeyData&, const ThreadSafeDataBuffer& value, int64_t recordID);
+    IDBError uncheckedPutIndexKey(const IDBIndexInfo&, const IDBKeyData& keyValue, const IndexKey&, int64_t recordID);
+    IDBError uncheckedPutIndexRecord(int64_t objectStoreID, int64_t indexID, const IDBKeyData& keyValue, const IDBKeyData& indexKey, int64_t recordID);
+    IDBError uncheckedHasIndexRecord(const IDBIndexInfo&, const IDBKeyData&, bool& hasRecord);
+    IDBError uncheckedGetIndexRecordForOneKey(int64_t indexeID, int64_t objectStoreID, IndexedDB::IndexRecordType, const IDBKeyData&, IDBGetResult&);
+
+    IDBError deleteUnusedBlobFileRecords(SQLiteIDBTransaction&);
+
+    IDBError getAllObjectStoreRecords(const IDBResourceIdentifier& transactionIdentifier, const IDBGetAllRecordsData&, IDBGetAllResult& outValue);
+    IDBError getAllIndexRecords(const IDBResourceIdentifier& transactionIdentifier, const IDBGetAllRecordsData&, IDBGetAllResult& outValue);
+
+    void closeSQLiteDB();
+
+    enum class SQL : size_t {
+        CreateObjectStoreInfo,
+        CreateObjectStoreKeyGenerator,
+        DeleteObjectStoreInfo,
+        DeleteObjectStoreKeyGenerator,
+        DeleteObjectStoreRecords,
+        DeleteObjectStoreIndexInfo,
+        DeleteObjectStoreIndexRecords,
+        DeleteObjectStoreBlobRecords,
+        RenameObjectStore,
+        ClearObjectStoreRecords,
+        ClearObjectStoreIndexRecords,
+        CreateIndexInfo,
+        DeleteIndexInfo,
+        HasIndexRecord,
+        PutIndexRecord,
+        GetIndexRecordForOneKey,
+        DeleteIndexRecords,
+        RenameIndex,
+        KeyExistsInObjectStore,
+        GetUnusedBlobFilenames,
+        DeleteUnusedBlobs,
+        GetObjectStoreRecordID,
+        DeleteBlobRecord,
+        DeleteObjectStoreRecord,
+        DeleteObjectStoreIndexRecord,
+        AddObjectStoreRecord,
+        AddBlobRecord,
+        BlobFilenameForBlobURL,
+        AddBlobFilename,
+        GetBlobURL,
+        GetKeyGeneratorValue,
+        SetKeyGeneratorValue,
+        GetAllKeyRecordsLowerOpenUpperOpen,
+        GetAllKeyRecordsLowerOpenUpperClosed,
+        GetAllKeyRecordsLowerClosedUpperOpen,
+        GetAllKeyRecordsLowerClosedUpperClosed,
+        GetValueRecordsLowerOpenUpperOpen,
+        GetValueRecordsLowerOpenUpperClosed,
+        GetValueRecordsLowerClosedUpperOpen,
+        GetValueRecordsLowerClosedUpperClosed,
+        GetKeyRecordsLowerOpenUpperOpen,
+        GetKeyRecordsLowerOpenUpperClosed,
+        GetKeyRecordsLowerClosedUpperOpen,
+        GetKeyRecordsLowerClosedUpperClosed,
+        Count
+    };
+
+    SQLiteStatement* cachedStatement(SQL, const char*);
+    SQLiteStatement* cachedStatementForGetAllObjectStoreRecords(const IDBGetAllRecordsData&);
+
+    std::unique_ptr<SQLiteStatement> m_cachedStatements[static_cast<int>(SQL::Count)];
+
+    JSC::VM& vm();
+    JSC::JSGlobalObject& globalObject();
+    void initializeVM();
+
+    IDBDatabaseIdentifier m_identifier;
+    std::unique_ptr<IDBDatabaseInfo> m_databaseInfo;
+    std::unique_ptr<IDBDatabaseInfo> m_originalDatabaseInfoBeforeVersionChange;
+
+    std::unique_ptr<SQLiteDatabase> m_sqliteDB;
+
+    HashMap<IDBResourceIdentifier, std::unique_ptr<SQLiteIDBTransaction>> m_transactions;
+    HashMap<IDBResourceIdentifier, SQLiteIDBCursor*> m_cursors;
+
+    String m_absoluteDatabaseDirectory;
+
+    RefPtr<JSC::VM> m_vm;
+    JSC::Strong<JSC::JSGlobalObject> m_globalObject;
+
+    IDBBackingStoreTemporaryFileHandler& m_temporaryFileHandler;
+};
+
+} // namespace IDBServer
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)