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

Source/core/rendering/RenderMultiColumnBlock.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 29 matching lines @@
     , m_columnCount(1)
     , m_columnWidth(0)
     , m_columnHeightAvailable(0)
     , m_inBalancingPass(false)
     , m_needsRebalancing(false)
 {
 }
 
 void RenderMultiColumnBlock::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
 {
-    RenderBlock::styleDidChange(diff, oldStyle);
+    RenderBlockFlow::styleDidChange(diff, oldStyle);
     for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox())
         child->setStyle(RenderStyle::createAnonymousStyleWithDisplay(style(), BLOCK));
 }
 
 void RenderMultiColumnBlock::computeColumnCountAndWidth()
 {
     // Calculate our column width and column count.
     // FIXME: Can overflow on fast/block/float/float-not-removed-from-next-sibling4.html, see https://bugs.webkit.org/show_bug.cgi?id=68744
     m_columnCount = 1;
     m_columnWidth = contentLogicalWidth();
@@ skipping 12 matching lines @@
         m_columnCount = max<LayoutUnit>(1, (availWidth + colGap) / (colWidth + colGap));
         m_columnWidth = ((availWidth + colGap) / m_columnCount) - colGap;
     } else {
         m_columnCount = max<LayoutUnit>(min<LayoutUnit>(colCount, (availWidth + colGap) / (colWidth + colGap)), 1);
         m_columnWidth = ((availWidth + colGap) / m_columnCount) - colGap;
     }
 }
 
 bool RenderMultiColumnBlock::updateLogicalWidthAndColumnWidth()
 {
-    bool relayoutChildren = RenderBlock::updateLogicalWidthAndColumnWidth();
+    bool relayoutChildren = RenderBlockFlow::updateLogicalWidthAndColumnWidth();
     LayoutUnit oldColumnWidth = m_columnWidth;
     computeColumnCountAndWidth();
     if (m_columnWidth != oldColumnWidth)
         relayoutChildren = true;
     return relayoutChildren;
 }
 
 void RenderMultiColumnBlock::checkForPaginationLogicalHeightChange(LayoutUnit& /*pageLogicalHeight*/, bool& /*pageLogicalHeightChanged*/, bool& /*hasSpecifiedPageLogicalHeight*/)
 {
     // We don't actually update any of the variables. We just subclassed to adjust our column height.
@@ skipping 28 matching lines @@
 
     m_inBalancingPass = needsRelayout;
     return needsRelayout;
 }
 
 void RenderMultiColumnBlock::addChild(RenderObject* newChild, RenderObject* beforeChild)
 {
     if (!m_flowThread) {
         m_flowThread = RenderMultiColumnFlowThread::createAnonymous(&document());
         m_flowThread->setStyle(RenderStyle::createAnonymousStyleWithDisplay(style(), BLOCK));
-        RenderBlock::addChild(m_flowThread);
+        RenderBlockFlow::addChild(m_flowThread);
     }
     m_flowThread->addChild(newChild, beforeChild);
 }
 
 RenderObject* RenderMultiColumnBlock::layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope& layoutScope)
 {
     if (!m_flowThread)
         return 0;
 
     // Update the dimensions of our regions before we lay out the flow thread.
@@ skipping 48 matching lines @@
     if (isPseudoElement())
         return "RenderMultiColumnBlock (generated)";
     if (isAnonymous())
         return "RenderMultiColumnBlock (generated)";
     if (isRelPositioned())
         return "RenderMultiColumnBlock (relative positioned)";
     return "RenderMultiColumnBlock";
 }
 
 }