Have RenderBlockFlow sub-classes' methods call their super-class method properly.

Source/core/rendering/RenderMultiColumnSet.cpp

 /*
  * 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 368 matching lines @@
             overflowRect.shiftMaxYEdgeTo(portionRect.maxY() + colGap - colGap / 2);
     }
     return overflowRect;
 }
 
 void RenderMultiColumnSet::paintObject(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
 {
     if (style()->visibility() != VISIBLE)
         return;
 
-    RenderBlock::paintObject(paintInfo, paintOffset);
+    RenderBlockFlow::paintObject(paintInfo, paintOffset);
 
     // FIXME: Right now we're only painting in the foreground phase.
     // Columns should technically respect phases and allow for background/float/foreground overlap etc., just like
     // RenderBlocks do. Note this is a pretty minor issue, since the old column implementation clipped columns
     // anyway, thus making it impossible for them to overlap one another. It's also really unlikely that the columns
     // would overlap another block.
     if (!m_flowThread || !isValid() || (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection))
         return;
 
     paintColumnRules(paintInfo, paintOffset);
@@ skipping 184 matching lines @@
         fragments.append(fragment);
     }
 }
 
 const char* RenderMultiColumnSet::renderName() const
 {
     return "RenderMultiColumnSet";
 }
 
 }