Move paint code from RenderMultiColumnSet to MultiColumnSetPainter.

Source/core/rendering/RenderMultiColumnSet.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 109 matching lines @@
 
     void paintInvalidationForFlowThreadContent(const LayoutRect& paintInvalidationRect) const;
 
     // The top of the nearest page inside the region. For RenderRegions, this is just the logical top of the
     // flow thread portion we contain. For sets, we have to figure out the top of the nearest column or
     // page.
     LayoutUnit pageLogicalTopForOffset(LayoutUnit offset) const;
 
     void collectLayerFragments(LayerFragments&, 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;
+
 private:
     RenderMultiColumnSet(RenderFlowThread*);
 
     virtual void insertedIntoTree() OVERRIDE FINAL;
     virtual void willBeRemovedFromTree() OVERRIDE FINAL;
 
     virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const OVERRIDE;
 
     virtual void paintObject(PaintInfo&, const LayoutPoint& paintOffset) OVERRIDE;
 
     virtual void addOverflowFromChildren() OVERRIDE;
 
     virtual const char* renderName() const OVERRIDE;
 
-    void paintColumnRules(PaintInfo&, const LayoutPoint& paintOffset);
-
     LayoutUnit calculateMaxColumnHeight() const;
-    LayoutUnit columnGap() const;
     LayoutRect columnRectAt(unsigned index) const;
 
-    // The "CSS actual" value of column-count. This includes overflowing columns, if any.
-    unsigned actualColumnCount() const;
 
     LayoutRect flowThreadPortionRectAt(unsigned index) const;
     LayoutRect flowThreadPortionOverflowRect(const LayoutRect& flowThreadPortion, unsigned index, unsigned colCount, LayoutUnit colGap) const;
 
     enum ColumnIndexCalculationMode {
         ClampToExistingColumns, // Stay within the range of already existing columns.
         AssumeNewColumns // Allow column indices outside the range of already existing columns.
     };
     unsigned columnIndexAtOffset(LayoutUnit, ColumnIndexCalculationMode = ClampToExistingColumns) const;
 
@@ skipping 44 matching lines @@
     };
     Vector<ContentRun, 1> m_contentRuns;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMultiColumnSet, isRenderMultiColumnSet());
 
 } // namespace blink
 
 #endif // RenderMultiColumnSet_h