Remove LayoutBlock::deleteLineBoxTree().

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 318 matching lines @@
             LayoutBlock* newBox = createAnonymousBlock();
             LayoutBox::addChild(newBox, beforeChild);
             newBox->addChild(newChild);
             return;
         }
     }
 
     LayoutBox::addChild(newChild, beforeChild);
 }
 
-void LayoutBlock::deleteLineBoxTree()
-{
-    ASSERT(!m_lineBoxes.firstLineBox());
-}
-
 void LayoutBlock::removeLeftoverAnonymousBlock(LayoutBlock* child)
 {
     ASSERT(child->isAnonymousBlock());
     ASSERT(!child->childrenInline());
     ASSERT(child->parent() == this);
 
     if (child->continuation())
         return;
 
     // Promote all the leftover anonymous block's children (to become children of this block
@@ skipping 1567 matching lines @@
         for (TrackedLayoutBoxListHashSet::const_iterator it = positionedDescendantSet->begin(); it != end; ++it) {
             LayoutBox* currBox = *it;
             ASSERT(!currBox->needsLayout());
         }
     }
 }
 
 #endif
 
 } // namespace blink