Delete selection gap code.

third_party/WebKit/Source/core/layout/line/RootInlineBox.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008 Apple Inc. 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 98 matching lines @@
     void paint(const PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) const override;
     bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) override;
 
     using InlineBox::hasSelectedChildren;
     using InlineBox::setHasSelectedChildren;
 
     SelectionState selectionState() const final;
     InlineBox* firstSelectedBox() const;
     InlineBox* lastSelectedBox() const;
 
-    GapRects lineSelectionGap(const LayoutBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, LayoutUnit selTop, LayoutUnit selHeight, const PaintInfo*) const;
-
     LayoutBlockFlow& block() const;
 
     InlineBox* closestLeafChildForPoint(const LayoutPoint&, bool onlyEditableLeaves);
     InlineBox* closestLeafChildForLogicalLeftPosition(LayoutUnit, bool onlyEditableLeaves = false);
 
     void appendFloat(LayoutBox* floatingBox)
     {
         ASSERT(!isDirty());
         if (m_floats)
             m_floats->append(floatingBox);
@@ skipping 62 matching lines @@
     LayoutUnit m_lineBottom;
     LayoutUnit m_lineTopWithLeading;
     LayoutUnit m_lineBottomWithLeading;
     LayoutUnit m_selectionBottom;
     LayoutUnit m_paginationStrut;
 };
 
 } // namespace blink
 
 #endif // RootInlineBox_h