Jump to the next outer column when an inner column is too short.

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 418 matching lines @@
     bool widthAvailableToChildrenHasChanged();
 
 public:
     // Specify which page or column to associate with an offset, if said offset is exactly at a page
     // or column boundary.
     enum PageBoundaryRule { AssociateWithFormerPage, AssociateWithLatterPage };
 
     LayoutUnit pageLogicalHeightForOffset(LayoutUnit) const;
     LayoutUnit pageRemainingLogicalHeightForOffset(LayoutUnit, PageBoundaryRule) const;
 
+    // Calculate the strut to insert in order fit content of size |contentLogicalHeight|.
+    // |strutToNextPage| is the strut to add to |offset| to merely get to the top of the next page
+    // or column. This is what will be returned if the content can actually fit there. Otherwise,
+    // return the distance to the next fragmentainer that can fit this piece of content.
+    LayoutUnit calculatePaginationStrutToFitContent(LayoutUnit offset, LayoutUnit strutToNextPage, LayoutUnit contentLogicalHeight) const;
+
 protected:
     bool isPageLogicalHeightKnown(LayoutUnit logicalOffset) const { return pageLogicalHeightForOffset(logicalOffset); }
 
     // Returns the logical offset at the top of the next page, for a given offset.
     //
     // 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).
     //
@@ skipping 34 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