Don't repeat header groups when one row of content doesn't fit on the first page

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 4872 matching lines @@
     return flowThread->pageLogicalHeightForOffset(offset + offsetFromLogicalTopOfFirstPage());
 }
 
 LayoutUnit LayoutBox::pageRemainingLogicalHeightForOffset(LayoutUnit offset, PageBoundaryRule pageBoundaryRule) const
 {
     LayoutView* layoutView = view();
     offset += offsetFromLogicalTopOfFirstPage();
 
     LayoutFlowThread* flowThread = flowThreadContainingBlock();
     if (!flowThread) {
-        LayoutUnit pageLogicalHeight = layoutView->layoutState()->pageLogicalHeight();

[rhogan, 2016/08/02 17:59:02]

Per
https://chromium.googlesource.com/chromium/src/+blame/master/third_party/WebK...,
this use of the layoutState is outdated so safe to remove. It always returns the
pageLogicalHeight maintained by the layoutView.

+        LayoutUnit pageLogicalHeight = layoutView->pageLogicalHeight();
         LayoutUnit remainingHeight = pageLogicalHeight - intMod(offset, pageLogicalHeight);
         if (pageBoundaryRule == AssociateWithFormerPage) {
             // An offset exactly at a page boundary will act as being part of the former page in
             // question (i.e. no remaining space), rather than being part of the latter (i.e. one
             // whole page length of remaining space).
             remainingHeight = intMod(remainingHeight, pageLogicalHeight);
         }
         return remainingHeight;
     }
 
@@ skipping 61 matching lines @@
         m_rareData->m_snapAreas->remove(&snapArea);
     }
 }
 
 SnapAreaSet* LayoutBox::snapAreas() const
 {
     return m_rareData ? m_rareData->m_snapAreas.get() : nullptr;
 }
 
 } // namespace blink