Remove all of WebCore/platform/mac which is not mentioned in WebCore.gypi.

Source/WebCore/platform/mac/SearchPopupMenuMac.h

-/*
- * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
- *
- * 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 SearchPopupMenuMac_h
-#define SearchPopupMenuMac_h
-
-#include "PopupMenuMac.h"
-#include "SearchPopupMenu.h"
-
-namespace WebCore {
-
-class SearchPopupMenuMac : public SearchPopupMenu {
-public:
-    SearchPopupMenuMac(PopupMenuClient*);
-
-    virtual PopupMenu* popupMenu();
-    virtual void saveRecentSearches(const AtomicString& name, const Vector<String>& searchItems);
-    virtual void loadRecentSearches(const AtomicString& name, Vector<String>& searchItems);
-    virtual bool enabled();
-
-private:
-    RefPtr<PopupMenuMac> m_popup;
-};
-
-}
-
-#endif // SearchPopupMenuMac_h