Need to examine the *bottom* of fragmented content.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 455 matching lines @@
     // If the given offset is at a page boundary, using AssociateWithLatterPage as PageBoundaryRule
     // will move us one page ahead (since the offset is at the top of the "current" page). Using
     // AssociateWithFormerPage instead will keep us where we are (since the offset is at the bottom
     // of the "current" page, which is exactly the same offset as the top offset on the next page).
     //
     // For a page height of 800px, AssociateWithLatterPage will return 1600 if the value passed in
     // is 800. AssociateWithFormerPage will simply return 800.
     LayoutUnit nextPageLogicalTop(LayoutUnit logicalOffset, PageBoundaryRule) const;
 
     // Paginated content inside this block was laid out.
-    // |logicalTopOffsetAfterPagination| is the logical top offset of the child content after
-    // applying any forced or unforced break, if needed.
-    void paginatedContentWasLaidOut(LayoutUnit logicalTopOffsetAfterPagination);
+    // |logicalBottomOffsetAfterPagination| is the logical bottom offset of the child content after
+    // applying any forced or unforced breaks as needed.
+    void paginatedContentWasLaidOut(LayoutUnit logicalBottomOffsetAfterPagination);
 
     // Adjust from painting offsets to the local coords of this layoutObject
     void offsetForContents(LayoutPoint&) const;
 
     virtual bool updateLogicalWidthAndColumnWidth();
 
     virtual bool canCollapseAnonymousBlockChild() const { return true; }
 
     LayoutObjectChildList m_children;
     LineBoxList m_lineBoxes; // All of the root line boxes created for this block flow.  For example, <div>Hello<br>world.</div> will have two total lines for the <div>.
@@ skipping 16 matching lines @@
     // FIXME: This is temporary as we move code that accesses block flow
     // member variables out of LayoutBlock and into LayoutBlockFlow.
     friend class LayoutBlockFlow;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutBlock, isLayoutBlock());
 
 } // namespace blink
 
 #endif // LayoutBlock_h