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

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 82 matching lines @@
 static const double resourcePriorityUpdateDelayAfterScroll = 0.250;
 
 static RenderLayer::UpdateLayerPositionsFlags updateLayerPositionFlags(RenderLayer* layer, bool isRelayoutingSubtree, bool didFullRepaint)
 {
     RenderLayer::UpdateLayerPositionsFlags flags = RenderLayer::defaultFlags;
 
     if (didFullRepaint) {
         flags &= ~RenderLayer::CheckForRepaint;
         flags |= RenderLayer::NeedsFullRepaintInBacking;
     }
-    if (isRelayoutingSubtree && layer->isPaginated())
-        flags |= RenderLayer::UpdatePagination;
     return flags;
 }
 
 Pagination::Mode paginationModeForRenderStyle(RenderStyle* style)
 {
     EOverflow overflow = style->overflowY();
     if (overflow != OPAGEDX && overflow != OPAGEDY)
         return Pagination::Unpaginated;
 
     bool isHorizontalWritingMode = style->isHorizontalWritingMode();
@@ skipping 3079 matching lines @@
 void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
 {
     ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
     if (AXObjectCache* cache = axObjectCache()) {
         cache->remove(scrollbar);
         cache->handleScrollbarUpdate(this);
     }
 }
 
 } // namespace WebCore