Column balancing refactoring. Don't propagate data during layout.

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

 /*
  * 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, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 2680 matching lines @@
             // 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;
     }
 
     return flowThread->pageRemainingLogicalHeightForOffset(offset, pageBoundaryRule);
 }
 
-void LayoutBlock::setPageBreak(LayoutUnit offset, LayoutUnit spaceShortage)
+void LayoutBlock::paginatedContentWasLaidOut(LayoutUnit logicalTopOffsetAfterPagination)
 {
     if (LayoutFlowThread* flowThread = flowThreadContainingBlock())
-        flowThread->setPageBreak(offsetFromLogicalTopOfFirstPage() + offset, spaceShortage);
+        flowThread->contentWasLaidOut(offsetFromLogicalTopOfFirstPage() + logicalTopOffsetAfterPagination);
 }
 
 void LayoutBlock::updateMinimumPageHeight(LayoutUnit offset, LayoutUnit minHeight)
 {
     if (LayoutFlowThread* flowThread = flowThreadContainingBlock())
         flowThread->updateMinimumPageHeight(offsetFromLogicalTopOfFirstPage() + offset, minHeight);
 }
 
 LayoutUnit LayoutBlock::collapsedMarginBeforeForChild(const LayoutBox& child) const
 {
@@ skipping 227 matching lines @@
 void LayoutBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const LayoutObject* obj) const
 {
     showLayoutObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink