Remove LayoutBlock::deleteLineBoxTree().

third_party/WebKit/Source/core/layout/LayoutBlockFlow.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) 2003-2013 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ skipping 81 matching lines @@
 
     static LayoutBlockFlow* createAnonymous(Document*);
     bool beingDestroyed() const { return m_beingDestroyed; }
 
     bool isLayoutBlockFlow() const final { return true; }
 
     void layoutBlock(bool relayoutChildren) override;
 
     void computeOverflow(LayoutUnit oldClientAfterEdge, bool recomputeFloats = false) override;
 
-    void deleteLineBoxTree() final;
+    void deleteLineBoxTree();
 
     LayoutUnit availableLogicalWidthForLine(LayoutUnit position, IndentTextOrNot indentText, LayoutUnit logicalHeight = LayoutUnit()) const
     {
         return (logicalRightOffsetForLine(position, indentText, logicalHeight) - logicalLeftOffsetForLine(position, indentText, logicalHeight)).clampNegativeToZero();
     }
     LayoutUnit logicalRightOffsetForLine(LayoutUnit position, IndentTextOrNot indentText, LayoutUnit logicalHeight = LayoutUnit()) const
     {
         return logicalRightOffsetForLine(position, logicalRightOffsetForContent(), indentText, logicalHeight);
     }
     LayoutUnit logicalLeftOffsetForLine(LayoutUnit position, IndentTextOrNot indentText, LayoutUnit logicalHeight = LayoutUnit()) const
@@ skipping 551 matching lines @@
 
 // END METHODS DEFINED IN LayoutBlockFlowLine
 
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutBlockFlow, isLayoutBlockFlow());
 
 } // namespace blink
 
 #endif // LayoutBlockFlow_h