Remove TiledBacking / TileCache code

Source/WebCore/platform/graphics/TiledBackingStoreBackend.h

-/*
- Copyright (C) 2011 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 TiledBackingStoreBackend_h
-#define TiledBackingStoreBackend_h
-
-#if USE(TILED_BACKING_STORE)
-
-#include "Tile.h"
-#include <wtf/PassOwnPtr.h>
-
-namespace WebCore {
-
-class TiledBackingStore;
-class TiledBackingStoreBackend;
-
-class TiledBackingStoreBackend {
-    WTF_MAKE_FAST_ALLOCATED;
-public:
-    static PassOwnPtr<TiledBackingStoreBackend> create() { return adoptPtr(new TiledBackingStoreBackend); }
-    virtual ~TiledBackingStoreBackend() { }
-    virtual PassRefPtr<Tile> createTile(TiledBackingStore*, const Tile::Coordinate&);
-    virtual void paintCheckerPattern(GraphicsContext*, const FloatRect&);
-
-protected:
-    TiledBackingStoreBackend() { }
-};
-
-}
-
-#endif
-
-#endif