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diff --git a/Source/WebCore/storage/IDBBackingStore.h b/Source/WebCore/storage/IDBBackingStore.h
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+/*
+ * Copyright (C) 2011 Google 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 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 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 IDBBackingStore_h
+#define IDBBackingStore_h
+
+#if ENABLE(INDEXED_DATABASE)
+
+#include "IDBCursor.h"
+#include "SQLiteDatabase.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+#include <wtf/RefPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class IDBFactoryBackendImpl;
+class IDBKey;
+class IDBKeyRange;
+class SecurityOrigin;
+
+class IDBBackingStore : public RefCounted<IDBBackingStore> {
+public:
+    static PassRefPtr<IDBBackingStore> open(SecurityOrigin*, const String& pathBase, int64_t maximumSize, const String& fileIdentifier, IDBFactoryBackendImpl*);
+    ~IDBBackingStore();
+
+    bool extractIDBDatabaseMetaData(const String& name, String& foundVersion, int64_t& foundId);
+    bool setIDBDatabaseMetaData(const String& name, const String& version, int64_t& rowId, bool invalidRowId);
+
+    void getObjectStores(int64_t databaseId, Vector<int64_t>& foundIds, Vector<String>& foundNames, Vector<String>& foundKeyPaths, Vector<bool>& foundAutoIncrementFlags);
+    bool createObjectStore(const String& name, const String& keyPath, bool autoIncrement, int64_t databaseId, int64_t& assignedObjectStoreId);
+    void deleteObjectStore(int64_t objectStoreId);
+    String getObjectStoreRecord(int64_t objectStoreId, const IDBKey&);
+    bool putObjectStoreRecord(int64_t objectStoreId, const IDBKey&, const String& value, int64_t& rowId, bool invalidRowId);
+    void clearObjectStore(int64_t objectStoreId);
+    void deleteObjectStoreRecord(int64_t objectStoreId, int64_t objectStoreDataId);
+    double nextAutoIncrementNumber(int64_t objectStoreId);
+    bool keyExistsInObjectStore(int64_t objectStoreId, const IDBKey&, int64_t& foundObjectStoreDataId);
+
+    class ObjectStoreRecordCallback {
+    public:
+         virtual bool callback(int64_t objectStoreDataId, const String& value) = 0;
+         virtual ~ObjectStoreRecordCallback() {};
+    };
+    bool forEachObjectStoreRecord(int64_t objectStoreId, ObjectStoreRecordCallback&);
+
+    void getIndexes(int64_t objectStoreId, Vector<int64_t>& foundIds, Vector<String>& foundNames, Vector<String>& foundKeyPaths, Vector<bool>& foundUniqueFlags);
+    bool createIndex(int64_t objectStoreId, const String& name, const String& keyPath, bool isUnique, int64_t& indexId);
+    void deleteIndex(int64_t indexId);
+    bool putIndexDataForRecord(int64_t indexId, const IDBKey&, int64_t objectStoreDataId);
+    bool deleteIndexDataForRecord(int64_t objectStoreDataId);
+    String getObjectViaIndex(int64_t indexId, const IDBKey&);
+    PassRefPtr<IDBKey> getPrimaryKeyViaIndex(int64_t indexId, const IDBKey&);
+    bool keyExistsInIndex(int64_t indexId, const IDBKey&);
+
+    class Cursor : public RefCounted<Cursor> {
+    public:
+        virtual bool continueFunction(const IDBKey* = 0) = 0;
+        virtual PassRefPtr<IDBKey> key() = 0;
+        virtual PassRefPtr<IDBKey> primaryKey() = 0;
+        virtual String value() = 0;
+        virtual int64_t objectStoreDataId() = 0;
+        virtual int64_t indexDataId() = 0;
+        virtual ~Cursor() {};
+    };
+
+    PassRefPtr<Cursor> openObjectStoreCursor(int64_t objectStoreId, const IDBKeyRange*, IDBCursor::Direction);
+    PassRefPtr<Cursor> openIndexKeyCursor(int64_t indexId, const IDBKeyRange*, IDBCursor::Direction);
+    PassRefPtr<Cursor> openIndexCursor(int64_t indexId, const IDBKeyRange*, IDBCursor::Direction);
+
+    class Transaction : public RefCounted<Transaction> {
+    public:
+        virtual void begin() = 0;
+        virtual void commit() = 0;
+        virtual void rollback() = 0;
+    };
+    PassRefPtr<Transaction> createTransaction();
+
+private:
+    IDBBackingStore(String identifier, IDBFactoryBackendImpl* factory);
+
+    SQLiteDatabase m_db;
+    String m_identifier;
+    RefPtr<IDBFactoryBackendImpl> m_factory;
+};
+
+} // namespace WebCore
+
+#endif
+
+#endif // IDBBackingStore_h