Remove the old multicol implementation.

Source/core/layout/LayoutGeometryMap.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 186 matching lines @@
     ASSERT(m_mapping.isEmpty() || isTopmostLayoutView(m_mapping[0].m_layoutObject));
 }
 
 static bool canMapBetweenLayoutObjects(const LayoutObject* layoutObject, const LayoutObject* ancestor)
 {
     for (const LayoutObject* current = layoutObject; ; current = current->parent()) {
         const ComputedStyle& style = current->styleRef();
         if (style.position() == FixedPosition || style.isFlippedBlocksWritingMode())
             return false;
 
-        if (current->hasColumns() || current->hasTransformRelatedProperty() || current->isLayoutFlowThread() || current->isSVGRoot())
+        if (current->hasTransformRelatedProperty() || current->isLayoutFlowThread() || current->isSVGRoot())
             return false;
 
         if (current == ancestor)
             break;
     }
 
     return true;
 }
 
 void LayoutGeometryMap::pushMappingsToAncestor(const DeprecatedPaintLayer* layer, const DeprecatedPaintLayer* ancestorLayer)
@@ skipping 123 matching lines @@
     // If we're not working with multiple LayoutViews, then any view is considered
     // "topmost" (to preserve original behavior).
     if (!(m_mapCoordinatesFlags & TraverseDocumentBoundaries))
         return true;
 
     return layoutObject->frame()->isMainFrame();
 }
 #endif
 
 } // namespace blink