*** DO NOT LAND *** Measure the size and complexity of the old multicol implementation.

Source/core/rendering/RenderInline.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 1006 matching lines @@
         if (inlineFlow->style()->hasInFlowPosition() && inlineFlow->hasLayer())
             repaintRect.move(toRenderInline(inlineFlow)->layer()->offsetForInFlowPosition());
     }
 
     LayoutUnit outlineSize = style()->outlineSize();
     repaintRect.inflate(outlineSize);
 
     if (hitRepaintContainer || !cb)
         return repaintRect;
 
-    if (cb->hasColumns())
-        cb->adjustRectForColumns(repaintRect);
-
     if (cb->hasOverflowClip())
         cb->applyCachedClipAndScrollOffsetForRepaint(repaintRect);
 
     cb->computeRectForRepaint(repaintContainer, repaintRect);
 
     if (outlineSize) {
         for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling()) {
             if (!curr->isText())
                 repaintRect.unite(curr->rectWithOutlineForRepaint(repaintContainer, outlineSize));
         }
@@ skipping 33 matching lines @@
     if (repaintContainer == this)
         return;
 
     bool containerSkipped;
     RenderObject* o = container(repaintContainer, &containerSkipped);
     if (!o)
         return;
 
     LayoutPoint topLeft = rect.location();
 
-    if (o->isRenderBlockFlow() && !style()->hasOutOfFlowPosition()) {
-        RenderBlock* cb = toRenderBlock(o);
-        if (cb->hasColumns()) {
-            LayoutRect repaintRect(topLeft, rect.size());
-            cb->adjustRectForColumns(repaintRect);
-            topLeft = repaintRect.location();
-            rect = repaintRect;
-        }
-    }
-
     if (style()->hasInFlowPosition() && layer()) {
         // Apply the in-flow position offset when invalidating a rectangle. The layer
         // is translated, but the render box isn't, so we need to do this to get the
         // right dirty rect. Since this is called from RenderObject::setStyle, the relative or sticky position
         // flag on the RenderObject has been cleared, so use the one on the style().
         topLeft += layer()->offsetForInFlowPosition();
     }
 
     // FIXME: We ignore the lightweight clipping rect that controls use, since if |o| is in mid-layout,
     // its controlClipRect will be wrong. For overflow clip we use the values cached by the layer.
@@ skipping 16 matching lines @@
 }
 
 LayoutSize RenderInline::offsetFromContainer(RenderObject* container, const LayoutPoint& point, bool* offsetDependsOnPoint) const
 {
     ASSERT(container == this->container());
 
     LayoutSize offset;
     if (isInFlowPositioned())
         offset += offsetForInFlowPosition();
 
-    container->adjustForColumns(offset, point);
-
     if (container->hasOverflowClip())
         offset -= toRenderBox(container)->scrolledContentOffset();
 
     if (offsetDependsOnPoint) {
-        *offsetDependsOnPoint = container->hasColumns()
-            || (container->isBox() && container->style()->isFlippedBlocksWritingMode())
+        *offsetDependsOnPoint = (container->isBox() && container->style()->isFlippedBlocksWritingMode())
             || container->isRenderFlowThread();
     }
 
     return offset;
 }
 
 void RenderInline::mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState& transformState, MapCoordinatesFlags mode, bool* wasFixed) const
 {
     if (repaintContainer == this)
         return;
@@ skipping 10 matching lines @@
     }
 
     bool containerSkipped;
     RenderObject* o = container(repaintContainer, &containerSkipped);
     if (!o)
         return;
 
     if (mode & ApplyContainerFlip && o->isBox()) {
         if (o->style()->isFlippedBlocksWritingMode()) {
             IntPoint centerPoint = roundedIntPoint(transformState.mappedPoint());
-            transformState.move(toRenderBox(o)->flipForWritingModeIncludingColumns(centerPoint) - centerPoint);
+            transformState.move(LayoutPoint() - centerPoint);
         }
         mode &= ~ApplyContainerFlip;
     }
 
     LayoutSize containerOffset = offsetFromContainer(o, roundedLayoutPoint(transformState.mappedPoint()));
 
     bool preserve3D = mode & UseTransforms && (o->style()->preserves3D() || style()->preserves3D());
     if (mode & UseTransforms && shouldUseTransformFromContainer(o)) {
         TransformationMatrix t;
         getTransformFromContainer(o, containerOffset, t);
@@ skipping 396 matching lines @@
         container = this;
 
     FloatPoint absPos = container->localToAbsolute();
     region.bounds.setX(absPos.x() + region.bounds.x());
     region.bounds.setY(absPos.y() + region.bounds.y());
 
     regions.append(region);
 }
 
 } // namespace WebCore