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diff --git a/Source/WebKit2/UIProcess/DefaultUndoController.h b/Source/WebKit2/UIProcess/DefaultUndoController.h
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+++ b/Source/WebKit2/UIProcess/DefaultUndoController.h
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+/*
+    Copyright (C) 2007 Staikos Computing Services Inc.
+    Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies)
+    Copyright (C) 2012 Samsung Electronics
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#ifndef DefaultUndoController_h
+#define DefaultUndoController_h
+
+#include "WebEditCommandProxy.h"
+#include "WebPageProxy.h"
+
+namespace WebKit {
+
+class DefaultUndoController {
+public:
+    void registerEditCommand(PassRefPtr<WebEditCommandProxy>, WebPageProxy::UndoOrRedo);
+    void clearAllEditCommands();
+    bool canUndoRedo(WebPageProxy::UndoOrRedo);
+    void executeUndoRedo(WebPageProxy::UndoOrRedo);
+
+private:
+    typedef Vector<RefPtr<WebEditCommandProxy> > CommandVector;
+    CommandVector m_undoStack;
+    CommandVector m_redoStack;
+};
+
+} // namespace WebKit
+
+#endif // DefaultUndoController_h