Remove -webkit-line-box-contain implementation.

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 130 matching lines @@
     FontBaseline baselineType() const { return static_cast<FontBaseline>(m_baselineType); }
 
     bool hasAnnotationsBefore() const { return m_hasAnnotationsBefore; }
     bool hasAnnotationsAfter() const { return m_hasAnnotationsAfter; }
 
     LayoutRect paddedLayoutOverflowRect(LayoutUnit endPadding) const;
 
     void ascentAndDescentForBox(InlineBox*, GlyphOverflowAndFallbackFontsMap&, int& ascent, int& descent, bool& affectsAscent, bool& affectsDescent) const;
     LayoutUnit verticalPositionForBox(InlineBox*, VerticalPositionCache&);
     bool includeLeadingForBox(InlineBox*) const;
-    bool includeFontForBox(InlineBox*) const;
-    bool includeGlyphsForBox(InlineBox*) const;
-    bool includeMarginForBox(InlineBox*) const;
-    bool fitsToGlyphs() const;
 
     LayoutUnit logicalTopVisualOverflow() const
     {
         return InlineFlowBox::logicalTopVisualOverflow(lineTop());
     }
     LayoutUnit logicalBottomVisualOverflow() const
     {
         return InlineFlowBox::logicalBottomVisualOverflow(lineBottom());
     }
     LayoutUnit logicalTopLayoutOverflow() const
@@ skipping 32 matching lines @@
     LayoutUnit m_lineBottom;
     LayoutUnit m_lineTopWithLeading;
     LayoutUnit m_lineBottomWithLeading;
     LayoutUnit m_selectionBottom;
     LayoutUnit m_paginationStrut;
 };
 
 } // namespace blink
 
 #endif // RootInlineBox_h