Use ceil() when integerizing pagination struts before table rows.

third_party/WebKit/Source/core/layout/LayoutTableSection.cpp

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1261 matching lines @@
   if (remainingLogicalHeight >= rowLogicalHeight)
     return 0;  // It fits fine where it is. No need to break.
   LayoutUnit paginationStrut = calculatePaginationStrutToFitContent(
       logicalOffset, remainingLogicalHeight, rowLogicalHeight);
   if (paginationStrut == remainingLogicalHeight &&
       remainingLogicalHeight == pageLogicalHeight) {
     // Don't break if we were at the top of a page, and we failed to fit the content
     // completely. No point in leaving a page completely blank.
     return 0;
   }
-  return paginationStrut.toInt();
+  // Table layout parts only work on integers, so we have to round. Round up, to
+  // make sure that no fraction ever gets left behind in the previous
+  // fragmentainer.
+  return paginationStrut.ceil();
 }
 
 void LayoutTableSection::computeOverflowFromCells() {
   unsigned totalRows = m_grid.size();
   unsigned nEffCols = table()->numEffectiveColumns();
   computeOverflowFromCells(totalRows, nEffCols);
 }
 
 void LayoutTableSection::computeOverflowFromCells(unsigned totalRows,
                                                   unsigned nEffCols) {
@@ skipping 636 matching lines @@
   // Repeating table headers are painted once per fragmentation page/column. This does not go through the regular fragmentation machinery,
   // so we need special code to expand the invalidation rect to contain all positions of the header in all columns.
   // Note that this is in flow thread coordinates, not visual coordinates. The enclosing LayoutFlowThread will convert to visual coordinates.
   if (table()->header() == this && isRepeatingHeaderGroup())
     rect.setHeight(table()->logicalHeight());
   return LayoutTableBoxComponent::mapToVisualRectInAncestorSpace(ancestor, rect,
                                                                  flags);
 }
 
 }  // namespace blink