Merge back LayoutLayerModelObject into RenderBoxModelObject

Source/core/layout/LayoutLayerModelObject.h

-/*
- * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
- *           (C) 1999 Antti Koivisto (koivisto@kde.org)
- * Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved.
- * Copyright (C) 2010, 2012 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 LayoutLayerModelObject_h
-#define LayoutLayerModelObject_h
-
-#include "core/layout/LayoutObject.h"
-
-namespace blink {
-
-class Layer;
-class LayerScrollableArea;
-
-enum LayerType {
-    NoLayer,
-    NormalLayer,
-    // A forced or overflow clip layer is required for bookkeeping purposes,
-    // but does not force a layer to be self painting.
-    OverflowClipLayer,
-    ForcedLayer
-};
-
-class LayoutLayerModelObject : public LayoutObject {
-public:
-    explicit LayoutLayerModelObject(ContainerNode*);
-    virtual ~LayoutLayerModelObject();
-
-    // This is the only way layers should ever be destroyed.
-    void destroyLayer();
-
-    bool hasSelfPaintingLayer() const;
-    Layer* layer() const { return m_layer.get(); }
-    LayerScrollableArea* scrollableArea() const;
-
-    virtual void styleWillChange(StyleDifference, const LayoutStyle& newStyle) override;
-    virtual void styleDidChange(StyleDifference, const LayoutStyle* oldStyle) override;
-    virtual void updateFromStyle() { }
-
-    virtual LayerType layerTypeRequired() const = 0;
-
-    // Returns true if the background is painted opaque in the given rect.
-    // The query rect is given in local coordinate system.
-    virtual bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect&) const { return false; }
-
-    // This is null for anonymous renderers.
-    ContainerNode* node() const { return toContainerNode(LayoutObject::node()); }
-
-    virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) override;
-
-    // Indicate that the contents of this renderer need to be repainted. Only has an effect if compositing is being used,
-    void setBackingNeedsPaintInvalidationInRect(const LayoutRect&, PaintInvalidationReason) const; // r is in the coordinate space of this render object
-
-protected:
-    void createLayer(LayerType);
-
-    virtual void willBeDestroyed() override;
-
-    virtual void addLayerHitTestRects(LayerHitTestRects&, const Layer*, const LayoutPoint&, const LayoutRect&) const override;
-
-    void addChildFocusRingRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset) const;
-
-private:
-    virtual bool isLayoutLayerModelObject() const override final { return true; }
-
-    OwnPtr<Layer> m_layer;
-
-    // Used to store state between styleWillChange and styleDidChange
-    static bool s_wasFloating;
-};
-
-DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutLayerModelObject, isLayoutLayerModelObject());
-
-} // namespace blink
-
-#endif // LayoutLayerModelObject_h