Pass values in the right flow thread's coordinate space.

third_party/WebKit/Source/core/layout/LayoutMultiColumnSet.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 100 matching lines @@
     // even here?
     ASSERT(pageLogicalHeightForOffset(flowThreadOffset) < contentLogicalHeight);
 
     // There's a likelihood for subsequent rows to be taller than the first one.
     // TODO(mstensho): if we're doubly nested (e.g. multicol in multicol in multicol), we need to
     // look beyond the first row here.
     const MultiColumnFragmentainerGroup& firstRow = firstFragmentainerGroup();
     LayoutUnit firstRowLogicalBottomInFlowThread = firstRow.logicalTopInFlowThread() + firstRow.logicalHeight() * usedColumnCount();
     if (flowThreadOffset >= firstRowLogicalBottomInFlowThread)
         return flowThreadOffset; // We're not in the first row. Give up.
-    LayoutUnit newLogicalHeight = enclosingFragmentationContext->fragmentainerLogicalHeightAt(firstRowLogicalBottomInFlowThread);
+    LayoutUnit newLogicalHeight = enclosingFragmentationContext->fragmentainerLogicalHeightAt(firstRow.blockOffsetInEnclosingFragmentationContext() + firstRow.logicalHeight());
     if (contentLogicalHeight > newLogicalHeight) {
         // The next outer column or page doesn't have enough space either. Give up and stay where
         // we are.
         return flowThreadOffset;
     }
     return firstRowLogicalBottomInFlowThread;
 }
 
 LayoutMultiColumnSet* LayoutMultiColumnSet::nextSiblingMultiColumnSet() const
 {
@@ skipping 271 matching lines @@
 
 LayoutRect LayoutMultiColumnSet::flowThreadPortionRect() const
 {
     LayoutRect portionRect(LayoutUnit(), logicalTopInFlowThread(), pageLogicalWidth(), logicalHeightInFlowThread());
     if (!isHorizontalWritingMode())
         return portionRect.transposedRect();
     return portionRect;
 }
 
 }