Remove internal recursion for RenderBlockFlow and RenderMultiColumnBlock layout

Source/core/rendering/RenderBlock.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 3478 matching lines @@
             colLogicalTop += index * (colLogicalHeight + colGap);
         else
             colLogicalTop += contentLogicalHeight() - colLogicalHeight - index * (colLogicalHeight + colGap);
     }
 
     if (isHorizontalWritingMode())
         return LayoutRect(colLogicalLeft, colLogicalTop, colLogicalWidth, colLogicalHeight);
     return LayoutRect(colLogicalTop, colLogicalLeft, colLogicalHeight, colLogicalWidth);
 }
 
-bool RenderBlock::relayoutToAvoidWidows(LayoutStateMaintainer& statePusher)
-{
-    if (!shouldBreakAtLineToAvoidWidow())
-        return false;
-
-    statePusher.pop();
-    setEverHadLayout(true);
-    layoutBlock(false);
-    return true;
-}
-
 void RenderBlock::adjustPointToColumnContents(LayoutPoint& point) const
 {
     // Just bail if we have no columns.
     if (!hasColumns())
         return;
 
     ColumnInfo* colInfo = columnInfo();
     if (!columnCount(colInfo))
         return;
 
@@ skipping 2132 matching lines @@
 void RenderBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const RenderObject* obj) const
 {
     showRenderObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace WebCore