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diff --git a/Source/WebCore/storage/AbstractDatabase.h b/Source/WebCore/storage/AbstractDatabase.h
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+/*
+ * Copyright (C) 2010 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.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * 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 AbstractDatabase_h
+#define AbstractDatabase_h
+
+#if ENABLE(DATABASE)
+
+#include "ExceptionCode.h"
+#include "PlatformString.h"
+#include "SQLiteDatabase.h"
+#include <wtf/Forward.h>
+#include <wtf/ThreadSafeShared.h>
+#ifndef NDEBUG
+#include "SecurityOrigin.h"
+#endif
+
+namespace WebCore {
+
+class DatabaseAuthorizer;
+class ScriptExecutionContext;
+class SecurityOrigin;
+
+class AbstractDatabase : public ThreadSafeShared<AbstractDatabase> {
+public:
+    static bool isAvailable();
+    static void setIsAvailable(bool available);
+
+    virtual ~AbstractDatabase();
+
+    virtual String version() const;
+
+    bool opened() const { return m_opened; }
+    bool isNew() const { return m_new; }
+
+    virtual ScriptExecutionContext* scriptExecutionContext() const;
+    virtual SecurityOrigin* securityOrigin() const;
+    virtual String stringIdentifier() const;
+    virtual String displayName() const;
+    virtual unsigned long estimatedSize() const;
+    virtual String fileName() const;
+    SQLiteDatabase& sqliteDatabase() { return m_sqliteDatabase; }
+
+    unsigned long long maximumSize() const;
+    void incrementalVacuumIfNeeded();
+    void interrupt();
+    bool isInterrupted();
+
+    // FIXME: move all version-related methods to a DatabaseVersionTracker class
+    bool versionMatchesExpected() const;
+    void setExpectedVersion(const String& version);
+    bool getVersionFromDatabase(String& version);
+    bool setVersionInDatabase(const String& version);
+
+    void disableAuthorizer();
+    void enableAuthorizer();
+    void setAuthorizerReadOnly();
+    void setAuthorizerPermissions(int permissions);
+    bool lastActionChangedDatabase();
+    bool lastActionWasInsert();
+    void resetDeletes();
+    bool hadDeletes();
+    void resetAuthorizer();
+
+    virtual void markAsDeletedAndClose() = 0;
+    virtual void closeImmediately() = 0;
+
+protected:
+    AbstractDatabase(ScriptExecutionContext*, const String& name, const String& expectedVersion,
+                     const String& displayName, unsigned long estimatedSize);
+
+    void closeDatabase();
+
+    virtual bool performOpenAndVerify(bool shouldSetVersionInNewDatabase, ExceptionCode& ec);
+
+    static const String& databaseInfoTableName();
+
+    RefPtr<ScriptExecutionContext> m_scriptExecutionContext;
+    RefPtr<SecurityOrigin> m_contextThreadSecurityOrigin;
+
+    String m_name;
+    String m_expectedVersion;
+    String m_displayName;
+    unsigned long m_estimatedSize;
+    String m_filename;
+
+#ifndef NDEBUG
+    String databaseDebugName() const { return m_contextThreadSecurityOrigin->toString() + "::" + m_name; }
+#endif
+
+private:
+    static const String& databaseVersionKey();
+
+    int m_guid;
+    bool m_opened;
+    bool m_new;
+
+    SQLiteDatabase m_sqliteDatabase;
+
+    RefPtr<DatabaseAuthorizer> m_databaseAuthorizer;
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(DATABASE)
+
+#endif // AbstractDatabase_h