Include column rules for LayoutMultiColumnSet paint invalidation rects.

third_party/WebKit/Source/core/layout/LayoutMultiColumnSet.h

 /*
  * Copyright (C) 2012 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 152 matching lines @@
 
     void collectLayerFragments(PaintLayerFragments&, const LayoutRect& layerBoundingBox, const LayoutRect& dirtyRect);
 
     LayoutUnit columnGap() const;
 
     // The "CSS actual" value of column-count. This includes overflowing columns, if any.
     unsigned actualColumnCount() const;
 
     const char* name() const override { return "LayoutMultiColumnSet"; }
 
+    // Sets |columnRuleBounds| to the bounds of each column rule rect's painted extent, adjusted by paint offset,
+    // before pixel snapping. Returns true if column rules should be painted at all.
+    bool computeColumnRuleBounds(const LayoutPoint& paintOffset, Vector<LayoutRect>& columnRuleBounds) const;
+
+    LayoutRect localOverflowRectForPaintInvalidation() const override;
+
 protected:
     LayoutMultiColumnSet(LayoutFlowThread*);
 
 private:
     unsigned fragmentainerGroupIndexAtFlowThreadOffset(LayoutUnit) const;
 
     void insertedIntoTree() final;
     void willBeRemovedFromTree() final;
 
     bool isSelfCollapsingBlock() const override { return false; }
@@ skipping 21 matching lines @@
 
     bool m_initialHeightCalculated;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutMultiColumnSet, isLayoutMultiColumnSet());
 
 } // namespace blink
 
 #endif // LayoutMultiColumnSet_h