Delete selection gap code.

third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.h

 /*
  * Copyright (C) 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 89 matching lines @@
     GraphicsLayer* ancestorClippingLayer() const { return m_ancestorClippingLayer.get(); }
 
     GraphicsLayer* foregroundLayer() const { return m_foregroundLayer.get(); }
 
     GraphicsLayer* backgroundLayer() const { return m_backgroundLayer.get(); }
     bool backgroundLayerPaintsFixedRootBackground() const { return m_backgroundLayerPaintsFixedRootBackground; }
 
     bool hasScrollingLayer() const { return m_scrollingLayer; }
     GraphicsLayer* scrollingLayer() const { return m_scrollingLayer.get(); }
     GraphicsLayer* scrollingContentsLayer() const { return m_scrollingContentsLayer.get(); }
-    GraphicsLayer* scrollingBlockSelectionLayer() const { return m_scrollingBlockSelectionLayer.get(); }
 
     bool hasMaskLayer() const { return m_maskLayer; }
     GraphicsLayer* maskLayer() const { return m_maskLayer.get(); }
 
     bool hasChildClippingMaskLayer() const { return m_childClippingMaskLayer; }
     GraphicsLayer* childClippingMaskLayer() const { return m_childClippingMaskLayer.get(); }
 
     GraphicsLayer* parentForSublayers() const;
     GraphicsLayer* childForSuperlayers() const;
     void setSublayers(const GraphicsLayerVector&);
@@ skipping 201 matching lines @@
 
     PaintLayer& m_owningLayer;
 
     // The hierarchy of layers that is maintained by the CompositedLayerMapping looks like this:
     //
     //  + m_ancestorClippingLayer [OPTIONAL]
     //    + m_graphicsLayer
     //      + m_childTransformLayer [OPTIONAL]
     //      | + m_childContainmentLayer [OPTIONAL] <-OR-> m_scrollingLayer [OPTIONAL]
     //      |                                             + m_scrollingContentsLayer [Present iff m_scrollingLayer is present]
-    //      |                                               + m_scrollingBlockSelectionLayer [Present iff m_scrollingLayer is present]
     //      + m_overflowControlsAncestorClippingLayer [OPTIONAL] // *The overflow controls may need to be repositioned in the
     //        + m_overflowControlsHostLayer [OPTIONAL]           //  graphics layer tree by the RLC to ensure that they stack
     //          + m_layerForVerticalScrollbar [OPTIONAL]         //  above scrolling content.
     //          + m_layerForHorizontalScrollbar [OPTIONAL]
     //          + m_layerForScrollCorner [OPTIONAL]
     //
     // We need an ancestor clipping layer if our clipping ancestor is not our ancestor in the
     // clipping tree. Here's what that might look like.
     //
     // Let A = the clipping ancestor,
@@ skipping 12 matching lines @@
     //
     // In this case B is clipped by another layer that doesn't happen to be its ancestor: A.
     // So we create an ancestor clipping layer for B, [+], which ensures that B is clipped
     // as if it had been A's descendant.
     OwnPtr<GraphicsLayer> m_ancestorClippingLayer; // Only used if we are clipped by an ancestor which is not a stacking context.
     OwnPtr<GraphicsLayer> m_graphicsLayer;
     OwnPtr<GraphicsLayer> m_childContainmentLayer; // Only used if we have clipping on a stacking context with compositing children.
     OwnPtr<GraphicsLayer> m_childTransformLayer; // Only used if we have perspective.
     OwnPtr<GraphicsLayer> m_scrollingLayer; // Only used if the layer is using composited scrolling.
     OwnPtr<GraphicsLayer> m_scrollingContentsLayer; // Only used if the layer is using composited scrolling.
-    OwnPtr<GraphicsLayer> m_scrollingBlockSelectionLayer; // Only used if the layer is using composited scrolling, but has no scrolling contents apart from block selection gaps.
 
     // This layer is also added to the hierarchy by the RLB, but in a different way than
     // the layers above. It's added to m_graphicsLayer as its mask layer (naturally) if
     // we have a mask, and isn't part of the typical hierarchy (it has no children).
     OwnPtr<GraphicsLayer> m_maskLayer; // Only used if we have a mask.
     OwnPtr<GraphicsLayer> m_childClippingMaskLayer; // Only used if we have to clip child layers or accelerated contents with border radius or clip-path.
 
     // There are two other (optional) layers whose painting is managed by the CompositedLayerMapping,
     // but whose position in the hierarchy is maintained by the PaintLayerCompositor. These
     // are the foreground and background layers. The foreground layer exists if we have composited
@@ skipping 67 matching lines @@
 
     unsigned m_backgroundLayerPaintsFixedRootBackground : 1;
     unsigned m_scrollingContentsAreEmpty : 1;
 
     friend class CompositedLayerMappingTest;
 };
 
 } // namespace blink
 
 #endif // CompositedLayerMapping_h