Delete selection gap code.

third_party/WebKit/Source/core/layout/LayoutObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google 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
@@ skipping 1119 matching lines @@
 
     virtual bool canBeSelectionLeaf() const { return false; }
     bool hasSelectedChildren() const { return selectionState() != SelectionNone; }
 
     bool isSelectable() const;
     // Obtains the selection colors that should be used when painting a selection.
     Color selectionBackgroundColor() const;
     Color selectionForegroundColor(const GlobalPaintFlags) const;
     Color selectionEmphasisMarkColor(const GlobalPaintFlags) const;
 
-    // Whether or not a given block needs to paint selection gaps.
-    virtual bool shouldPaintSelectionGaps() const { return false; }
-
     /**
      * Returns the local coordinates of the caret within this layout object.
      * @param caretOffset zero-based offset determining position within the layout object.
      * @param extraWidthToEndOfLine optional out arg to give extra width to end of line -
      * useful for character range rect computations
      */
     virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = nullptr);
 
     // When performing a global document tear-down, the layoutObject of the document is cleared. We use this
     // as a hook to detect the case of document destruction and don't waste time doing unnecessary work.
@@ skipping 955 matching lines @@
 void showTree(const blink::LayoutObject*);
 void showLineTree(const blink::LayoutObject*);
 void showLayoutTree(const blink::LayoutObject* object1);
 // We don't make object2 an optional parameter so that showLayoutTree
 // can be called from gdb easily.
 void showLayoutTree(const blink::LayoutObject* object1, const blink::LayoutObject* object2);
 
 #endif
 
 #endif // LayoutObject_h