Remove RenderLayer::m_lostGroupedMapping

sky/engine/core/rendering/RenderLayer.h

 /*
  * Copyright (C) 2003, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
@@ skipping 225 matching lines @@
     RenderLayerClipper& clipper() { return m_clipper; }
     const RenderLayerClipper& clipper() const { return m_clipper; }
 
     inline bool isPositionedContainer() const
     {
         // FIXME: This is not in sync with containingBlock.
         RenderLayerModelObject* layerRenderer = renderer();
         return isRootLayer() || layerRenderer->isPositioned() || hasTransform();
     }
 
-    bool lostGroupedMapping() const { return m_lostGroupedMapping; }
-    void setLostGroupedMapping(bool b) { m_lostGroupedMapping = b; }
-
     void updateOrRemoveFilterEffectRenderer();
-
     void updateSelfPaintingLayer();
 
 private:
     // TODO(ojan): Get rid of this. These are basically layer-tree-only paint phases.
     enum PaintLayerFlags {
         PaintContent,
     };
 
     // Bounding box in the coordinates of this layer.
     LayoutRect logicalBoundingBox() const;
@@ skipping 93 matching lines @@
                                  // we ended up painting this layer or any descendants (and therefore need to
                                  // blend).
 
     unsigned m_3DTransformedDescendantStatusDirty : 1;
     // Set on a stacking context layer that has 3D descendants anywhere
     // in a preserves3D hierarchy. Hint to do 3D-aware hit testing.
     unsigned m_has3DTransformedDescendant : 1;
 
     unsigned m_hasFilterInfo : 1;
 
-    // True if this render layer just lost its grouped mapping due to the CompositedLayerMapping being destroyed,
-    // and we don't yet know to what graphics layer this RenderLayer will be assigned.
-    unsigned m_lostGroupedMapping : 1;
-
     RenderLayerModelObject* m_renderer;
 
     RenderLayer* m_parent;
     RenderLayer* m_previous;
     RenderLayer* m_next;
     RenderLayer* m_first;
     RenderLayer* m_last;
 
     // Cached normal flow values for absolute positioned elements with static left/top values.
     LayoutUnit m_staticInlinePosition;
     LayoutUnit m_staticBlockPosition;
 
     OwnPtr<TransformationMatrix> m_transform;
 
     RenderLayerClipper m_clipper; // FIXME: Lazily allocate?
     OwnPtr<RenderLayerStackingNode> m_stackingNode;
 
     LayoutSize m_subpixelAccumulation; // The accumulated subpixel offset of a composited layer's composited bounds compared to absolute coordinates.
 };
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLayerTree(const blink::RenderLayer*);
 void showLayerTree(const blink::RenderObject*);
 #endif
 
 #endif  // SKY_ENGINE_CORE_RENDERING_RENDERLAYER_H_