Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/filters/SourceGraphic.h

-/*
- * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
- * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
- * Copyright (C) 2013 Google Inc. All rights reserved.
- *
- * 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 SourceGraphic_h
-#define SourceGraphic_h
-
-#include "core/platform/graphics/filters/Filter.h"
-#include "core/platform/graphics/filters/FilterEffect.h"
-
-namespace WebCore {
-
-class SourceGraphic : public FilterEffect {
-public:
-    static PassRefPtr<SourceGraphic> create(Filter*);
-
-    static const AtomicString& effectName();
-
-    virtual void determineAbsolutePaintRect();
-
-    virtual FilterEffectType filterEffectType() const { return FilterEffectTypeSourceInput; }
-
-    virtual TextStream& externalRepresentation(TextStream&, int indention) const;
-
-private:
-    SourceGraphic(Filter* filter)
-        : FilterEffect(filter)
-    {
-        setOperatingColorSpace(ColorSpaceDeviceRGB);
-    }
-
-    virtual void applySoftware() OVERRIDE;
-};
-
-} //namespace WebCore
-
-#endif // SourceGraphic_h