Delete selection gap code.

third_party/WebKit/Source/core/paint/PaintLayer.h

Index: third_party/WebKit/Source/core/paint/PaintLayer.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.h b/third_party/WebKit/Source/core/paint/PaintLayer.h
index dd5f4f5142708bd1199a8da0aaab94d59007832c..62d1a6df39fcef43886204fd92c1adf5e8cda48f 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.h
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.h
@@ -125,8 +125,6 @@ struct PaintLayerRareData {
     // paints into its own backing.
     CompositedLayerMapping* groupedMapping;
 
-    IntRect blockSelectionGapsBounds;
-
     OwnPtr<PaintLayerReflectionInfo> reflectionInfo;
 
     // The accumulated subpixel offset of a composited layer's composited bounds compared to absolute coordinates.
@@ -275,12 +273,6 @@ public:
 
     LayoutSize offsetForInFlowPosition() const { return m_rareData ? m_rareData->offsetForInFlowPosition : LayoutSize(); }
 
-    void addBlockSelectionGapsBounds(const LayoutRect&);
-    void clearBlockSelectionGapsBounds();
-    void invalidatePaintForBlockSelectionGaps();
-    IntRect blockSelectionGapsBounds() const;
-    bool hasBlockSelectionGapBounds() const;
-
     PaintLayerStackingNode* stackingNode() { return m_stackingNode.get(); }
     const PaintLayerStackingNode* stackingNode() const { return m_stackingNode.get(); }
 
@@ -746,8 +738,6 @@ private:
     void updatePaginationRecursive(bool needsPaginationUpdate = false);
     void clearPaginationRecursive();
 
-    void blockSelectionGapsBoundsChanged();
-
     void markCompositingContainerChainForNeedsRepaint();
 
     PaintLayerRareData& ensureRareData()