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diff --git a/WebCore/storage/DatabaseSync.h b/WebCore/storage/DatabaseSync.h
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+++ b/WebCore/storage/DatabaseSync.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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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 DatabaseSync_h
+#define DatabaseSync_h
+
+#if ENABLE(DATABASE)
+#include "AbstractDatabase.h"
+#include "ExceptionCode.h"
+#include "PlatformString.h"
+#include <wtf/Forward.h>
+#ifndef NDEBUG
+#include "SecurityOrigin.h"
+#endif
+
+namespace WebCore {
+
+class DatabaseCallback;
+class SQLTransactionSync;
+class SQLTransactionSyncCallback;
+class ScriptExecutionContext;
+class SecurityOrigin;
+
+// Instances of this class should be created and used only on the worker's context thread.
+class DatabaseSync : public AbstractDatabase {
+public:
+    virtual ~DatabaseSync();
+
+    static PassRefPtr<DatabaseSync> openDatabaseSync(ScriptExecutionContext*, const String& name, const String& expectedVersion,
+                                                     const String& displayName, unsigned long estimatedSize, PassRefPtr<DatabaseCallback>, ExceptionCode&);
+    void changeVersion(const String& oldVersion, const String& newVersion, PassRefPtr<SQLTransactionSyncCallback>, ExceptionCode&);
+    void transaction(PassRefPtr<SQLTransactionSyncCallback>, bool readOnly, ExceptionCode&);
+
+    virtual void markAsDeletedAndClose();
+    virtual void closeImmediately();
+
+private:
+    DatabaseSync(ScriptExecutionContext*, const String& name, const String& expectedVersion,
+                 const String& displayName, unsigned long estimatedSize);
+};
+
+} // namespace WebCore
+
+#endif // ENABLE(DATABASE)
+
+#endif // DatabaseSync_h