Distinguish between row (fragmentainer group) height and column (fragmentainer) height.

third_party/WebKit/Source/core/layout/LayoutMultiColumnSet.h

 /*
  * 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 141 matching lines @@
     // Due to negative margins, logical bottom may actually end up above logical
     // top, but we never want to return negative logical heights.
     return (LogicalBottomInFlowThread() - LogicalTopInFlowThread())
         .ClampNegativeToZero();
   }
 
   // Return the amount of flow thread contents that the specified fragmentainer
   // group can hold without overflowing.
   LayoutUnit FragmentainerGroupCapacity(
       const MultiColumnFragmentainerGroup& group) const {
-    return group.LogicalHeight() * UsedColumnCount();
+    return group.ColumnLogicalHeight() * UsedColumnCount();
   }
 
   LayoutRect FlowThreadPortionRect() const;
 
   // The used CSS value of column-count, i.e. how many columns there are room
   // for without overflowing.
   unsigned UsedColumnCount() const {
     return MultiColumnFlowThread()->ColumnCount();
   }
 
@@ skipping 98 matching lines @@
   LayoutUnit old_logical_top_;
 
   bool initial_height_calculated_;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutMultiColumnSet, IsLayoutMultiColumnSet());
 
 }  // namespace blink
 
 #endif  // LayoutMultiColumnSet_h